Stephen Hawking quote

"One might think this means that imaginary numbers are just a mathematical game having nothing to do with the real world. From the viewpoint of positivist philosophy, however, one cannot determine what is real. All one can do is find which mathematical models describe the universe we live in. It turns out that a mathematical model involving imaginary time predicts not only effects we have already observed but also effects we have not been able to measure yet nevertheless believe in for other reasons. So what is real and what is imaginary? Is the distinction just in our minds?"

Stephen Hawking

Born: January 8, 1942

Occupation: Physicist

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More quotes of Stephen Hawking

Stephen Hawking

Not to take this web of dualities as a sign we are on the right track would be a bit like believing that God put fossils into the rocks in order to mislead Darwin about the evolution of life.

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Stephen Hawking

The universe and the Laws of Physics seem to have been specifically designed for us. If any one of about 40 physical qualities had more than slightly different values, life as we know it could not exist:...

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Stephen Hawking

If you understand how the universe operates, you control it in a way.

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Stephen Hawking

Only a very few would allow creatures like us to exist. Thus our presence selects out from this vast array only these universes that are compatible without existence. Although we are puny and insignificant...

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Stephen Hawking

A million million million million (1 with twenty-four zeros after it) miles, the size of the observable universe.

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Stephen Hawking

The downside of my celebrity is that I cannot go anywhere in the world without being recognized. It is not enough for me to wear dark sunglasses and a wig. The wheelchair gives me away.

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Stephen Hawking

thus, in a sense, we are all doomed. even if we stay away from black holes

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Stephen Hawking

One of the basic rules of the universe is that nothing is perfect. Perfection simply doesn't exist.....Without imperfection, neither you nor I would exist

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Stephen Hawking

If time travel is possible, where are the tourists from the future?

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Stephen Hawking

The rate of progress is so rapid that what one learns at school or university is always a bit out of date. Only a few people can keep up with the rapidly advancing frontier of knowledge, and they have...

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Stephen Hawking

Mankind's greatest achievements have come about by talking and its greatest failures by not talking. It doesn’t have to be like this.

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Stephen Hawking

Nothing is better than reading and gaining more and more knowledge.

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Stephen Hawking

What I have done is to show that it is possible for the way the universe began to be determined by the laws of science. In that case, it would not be necessary to appeal to God to decide how the universe...

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Stephen Hawking

My expectations were reduced to zero when I was 21. Everything since then has been a bonus.

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Stephen Hawking

The victim should have the right to end his life, if he wants. But I think it would be a great mistake. However bad life may seem, there is always something you can do, and succeed at. While there's life,...

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Stephen Hawking

One could say: "The boundary condition of the universe is that it has no boundary." The universe would be completely self-contained and not affected by anything outside itself. It would neither be created...

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Stephen Hawking

The thing about smart people is that they seem like crazy people to dumb people.

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Stephen Hawking

If the government is covering up knowledge of aliens, they are doing a better job of it than they do at anything else.

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Stephen Hawking

Any physical theory is always provisional, in the sense that it is only a hypothesis: you can never prove it. No matter how many times the results of experiments agree with some theory, you can never be...

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Stephen Hawking

What I have learned from life is to make the most of what you have got.

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Stephen Hawking

Disorder increases with time because we measure time in the direction in which disorder increases.

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Stephen Hawking

The Universe in a Nutshell

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Stephen Hawking

The laws of science do not distinguish between the past and the future.

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Stephen Hawking

Ever since the dawn of civilization, people have not been content to see events as unconnected and inexplicable. They have craved an understanding of the underlying order in the world. Today we still yearn...

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Stephen Hawking

Although I cannot move and I have to speak through a computer, in my mind I am free.

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Stephen Hawking

Government works best under the glare of public scrutiny. Absent such scrutiny, abuses occur.

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Stephen Hawking

Please join me in applauding the ESA - European Space Agency’s historic efforts with the Rosetta Mission and landing a spacecraft on rotating comet. It may seem like a work of fiction, but it is very...

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Stephen Hawking

God abhors a naked singularity.

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Stephen Hawking

It [AI] would take off on its own and redesign itself at an ever increasing rate. Humans, who are limited by slow biological evolution, couldn't compete and would be superseded.

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Stephen Hawking

Time and space are finite in extent, but they don't have any boundary or edge. They would be like the surface of the earth, but with two more dimensions.

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Stephen Hawking

We got through all of Genesis and part of Exodus before I left. One of the main things I was taught from this was not to begin a sentence with And. I pointed out that most sentences in the Bible began...

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Stephen Hawking

"With genetic engineering, we will be able to increase the complexity of our DNA, and improve the human race. But it will be a slow process, because one will have to wait about 18 years to see the effect...

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Stephen Hawking

"Sooner or later disasters such as an asteroid collision or a nuclear war could wipe us all out, But once we spread out into space and establish independent colonies, our future should be safe."

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Stephen Hawking

Then we shall... be able to take part in the discussion of the question of why it is that we and the universe exist. If we find the answer to that, it would be the ultimate triumph of human reason - for...

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Stephen Hawking

So long as the universe had a beginning, we could suppose it had a creator. But if the universe is really completely self-contained, having no boundary or edge, it would have neither beginning nor end:...

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Stephen Hawking

I've noticed that even people who believe in fate look both ways before crossing the street.

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Stephen Hawking

In the last 200 years the population of our planet has grown exponentially, at a rate of 1.9% per year. If it continued at this rate, with the population doubling every 40 years, by 2600 we would all be...

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Stephen Hawking

You cannot understand the glories of the universe without believing there is some Supreme Power behind it.

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Stephen Hawking

It matters if you just don't give up.

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Stephen Hawking

One is always a long way from solving a problem until one actually has the answer.

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Stephen Hawking

There is a very real danger that we will kill everything on this planet now that we have the technological power to do so.

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Stephen Hawking

In fact, if one considers the possible constants and laws that could have emerged, the odds against a universe that produced life like ours are immense.

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Stephen Hawking

Though we feel we can choose what we do, our understanding of the molecular basis of biology shows that biological processes are governed by the laws of physics and chemistry and therefore are as determined...

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Stephen Hawking

When I hear of Schrödinger's cat, I reach for my pistol.

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Stephen Hawking

If what we regard as real depends on our theory, how can we make reality the basis of our philosophy? ...But we cannot distinguish what is real about the universe without a theory...it makes no sense to...

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Stephen Hawking

I don't think the human race will survive the next thousand years, unless we spread into space. There are too many accidents that can befall life on a single planet. But I'm an optimist. We will reach...

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Stephen Hawking

If the total energy of the universe must always remain zero, and it costs energy to create a body, how can a whole universe be created from nothing?

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Stephen Hawking

Why do we remember the past, but not the future?

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Stephen Hawking

Equations are just the boring part of mathematics. I attempt to see things in terms of geometry.

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Stephen Hawking

There is no way that we can predict the weather six months ahead beyond giving the seasonal average

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Stephen Hawking

Physics as we know it will be over in six months - Max Born

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Stephen Hawking

It's the gravity that shapes the large scale structure of the universe, even though it is the weakest of four categories of forces

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Stephen Hawking

Maybe I'm being a bit harsh on philosophers, but they have not been very kind to me... I have been variously called nominalist, an instrumentalist, a positivist, a realist, and several other ists. The...

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Stephen Hawking

In his eyes shone the reflection of the most beautiful planet in the Universe---a planet that is not too hot and not too cold; that has liquid water on the surface and where the gravity is just right for...

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Stephen Hawking

[On President Bush's plan to get to Mars in 10 years] Stupid. Robots would do a better job and be much cheaper because you don't have to bring them back.

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Stephen Hawking

I have experimental evidence that time travel is not possible.

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Stephen Hawking

I believe the simplest explanation is, there is no God. No one created the universe and no one directs our fate. This leads me to a profound realization that there probably is no heaven and no afterlife...

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Stephen Hawking

Simplicity is a matter of taste

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Stephen Hawking

Scientists tend to risk theories they admire

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Stephen Hawking

The idea of 10 dimensions might sound exciting, but they would cause real problems if you forget where you parked your car.

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Stephen Hawking

We believe human begins have existed for only a small fraction of cosmic history, because human race has been improving so rapidly in knowledge and technology that if people had been around for millions...

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Stephen Hawking

If you are lucky enough to find love, remember it is there and don't throw it away.

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Stephen Hawking

Because imaginary time behaves like another direction in space, histories in imaginary time can be closed surfaces, like the surface of the Earth, with no [existential] beginning or end.

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Stephen Hawking

God not only plays dice, he throws them in the corner where you can't see them.

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Stephen Hawking

If everything in the universe depends upon everything else in a fundamental way, it might be impossible to get close to a full solution by investigating parts of the problem in isolation.

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Stephen Hawking

Because there is a law such as gravity, the Universe can and will create itself from nothing. Spontaneous creation is the reason there is something rather than nothing, why the Universe exists, why we...

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Stephen Hawking

We could call order by the name of God, but it would be an impersonal God. There's not much personal about the laws of physics.

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Stephen Hawking

In real time, the universe has a beginning and an end at singularities that form a boundary to space-time and at which the laws of science break down.

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Stephen Hawking

The human capacity for guilt is such that people can always find ways to blame themselves

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Stephen Hawking

There is no prescribed route to follow to arrive at a new idea. You have to make the intuitive leap.

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Stephen Hawking

A few years ago, the city council of Monza, Italy, barred pet owners from keeping goldfish in curved bowls... saying that it is cruel to keep a fish in a bowl with curved sides because, gazing out, the...

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Stephen Hawking

We each exist for but a short time, and in that time explore but a small part of the whole universe

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Stephen Hawking

So when people ask me if I believe God created the universe, I tell them that the question itself makes no sense. Time didn't exist before the Big Bang, so there is no time for God to make the universe...

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Stephen Hawking

Quiet people have the loudest minds.

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Stephen Hawking

The initial configuration of the universe may have been chosen by God, or it may itself have been determined by the laws of science. In either case, it would seem that everything in the universe would...

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Stephen Hawking

Some individuals are better able than others to draw the right conclusions about the world about them and act accordingly. These individuals will be more likely to survive and reproduce so their pattern...

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Stephen Hawking

The intelligent beings in these regions should therefore not be surprised if they observe that their locality in the universe satisfies the conditions that are necessary for their existence. It is a bit...

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Stephen Hawking

Science does not deny religion, it just offers a simpler alternative.

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Stephen Hawking

Our population and our use of the finite resources of planet Earth are growing exponentially, along with our technical ability to change the environment for good or ill.

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Stephen Hawking

I want my books sold on airport bookstalls.

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Stephen Hawking

If it were only a few degrees, that would be serious, but we could adapt to it. But the danger is the warming process might be unstable and run away. We could end up like Venus, covered in clouds and with...

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Stephen Hawking

Its a crazy world out there. Be curious.

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Stephen Hawking

One can see from space how the human race has changed the Earth. Nearly all of the available land has been cleared of forest and is now used for agriculture or urban development. The polar icecaps are...

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Stephen Hawking

Remember to look up at the stars and not down at your feet. Try to make sense of what you see and wonder about what makes the universe exist. Be curious. And however difficult life may seem, there is always...

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Stephen Hawking

I’m the archetype of a disabled genius, or should I say a physically challenged genius, to be politically correct. At least I’m obviously physically challenged. Whether I’m a genius is more open...

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Stephen Hawking

We are very, very small, but we are profoundly capable of very, very big things

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Stephen Hawking

When one's expectations are reduced to zero, one really appreciates everything one does have

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Stephen Hawking

Issuing an insurance policy against abduction by aliens seems a pretty safe bet.

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Stephen Hawking

All that my work has shown is that you don't have to say that the way the universe began was the personal whim of God.

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Stephen Hawking

Real science can be far stranger than science fiction and much more satisfying.

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Stephen Hawking

While there's life, there is hope.

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Stephen Hawking

Eternity is a long time, especially towards the end.

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Stephen Hawking

Speech has allowed the communication of ideas, enabling human beings to work together to build the impossible. Mankind's greatest achievements have come about by talking, and its greatest failures by not...

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Stephen Hawking

It surprises me how disinterested we are today about things like physics, space, the universe and philosophy of our existence, our purpose, our final destination. Its a crazy world out there. Be curious.

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Stephen Hawking

In this way, Edwin Hubble worked out the distances to nine different galaxies. We now know that our galaxy is only one of some hundred thousand million that can be seen using modern telescopes, each galaxy...

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Stephen Hawking

Many people do not like the idea that time has a beginning, probably because it smacks of divine intervention. (The Catholic Church, on the other hand, seized on the big bang model and in 1951 officially...

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Stephen Hawking

We don't let animals suffer, so why humans?

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Stephen Hawking

Not to leave planet Earth would be like castaways on a desert island not trying to escape...Sending humans to other planets ... will shape the future of the human race in ways we don't yet understand,...

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Stephen Hawking

The human race shouldn't have all its eggs in one basket, or on one planet. Let's hope we can avoid dropping the basket until we have spread the load.

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Stephen Hawking

Although quantum mechanics has been around for nearly 70 years, it is still not generally understood or appreciated, even by those that use it to do calculations.

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Stephen Hawking

As those who have seen Jurassic Park will know, this means a tiny disturbance in one place, can cause a major change in another. A butterfly flapping its wings can cause rain in Central Park, New York....

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Stephen Hawking

The universe does not behave according to our pre-conceived ideas. It continues to surprise us.

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Stephen Hawking

If there really is a complete unified theory that governs everything, it presumably also determines your actions. But it does so in a way that is impossible to calculate for an organism that is as complicated...

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Stephen Hawking

While physics and mathematics may tell us how the universe began, they are not much use in predicting human behavior because there are far too many equations to solve. I'm no better than anyone else at...

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Stephen Hawking

Of course it is possible that UFO's really do contain aliens as many people believe, and the government is hushing it up

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Stephen Hawking

We are all different. There is no such thing as a standard or run-of-the-mill human being, but we share the same human spirit.

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Stephen Hawking

Don't be disabled in spirit as well as physically.

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Stephen Hawking

The human failing I would most like to correct is aggression. It may have had survival advantage in caveman days, to get more food, territory or partner with whom to reproduce, but now it threatens to...

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Stephen Hawking

I have lived with the prospect of an early death for the last 49 years. I'm not afraid of death, but I'm in no hurry to die. I have so much I want to do first. I regard the brain as a computer which will...

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Stephen Hawking

We find ourselves in a bewildering world. We want to make sense of what we see around us and to ask: What is the nature of the universe? What is our place in it and where did it and we come from? Why is...

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Stephen Hawking

However difficult life may seem, there is always something you can do and succeed at.

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Stephen Hawking

Scientific discovery may not be better than sex, but the satisfaction lasts longer.

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Stephen Hawking

I was not a good student. I did not spend much time at college; I was too busy enjoying myself.

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Stephen Hawking

Disability need not be an obstacle to success.

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Stephen Hawking

We should seek the greatest value of our action.

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Stephen Hawking

What you have told us is rubbish. The world is really a flat plate supported on the back of a giant tortoise.

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Stephen Hawking

I am just a child who has never grown up. I still keep asking these 'how' and 'why' questions. Occasionally, I find an answer.

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Stephen Hawking

So Einstein was wrong when he said, "God does not play dice." Consideration of black holes suggests, not only that God does play dice, but that he sometimes confuses us by throwing them where they can't...

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Stephen Hawking

I have noticed even people who claim everything is predestined, and that we can do nothing to change it, look before they cross the road.

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Stephen Hawking

Intelligence is the ability to adapt to change.

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Stephen Hawking

People won't have time for you if you are always angry or complaining.

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Stephen Hawking

We are just an advanced breed of monkeys on a minor planet of a very average star. But we can understand the Universe. That makes us something very special.

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Stephen Hawking

I think computer viruses should count as life. I think it says something about human nature that the only form of life we have created so far is purely destructive. We've created life in our own image.

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Stephen Hawking

Women. They are a complete mystery.

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Stephen Hawking

We are in danger of destroying ourselves by our greed and stupidity. We cannot remain looking inwards at ourselves on a small and increasingly polluted and overcrowded planet.

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Stephen Hawking

Not only does God play dice, but... he sometimes throws them where they cannot be seen.

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Stephen Hawking

Life would be tragic if it weren't funny.

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Stephen Hawking

I'm not afraid of death, but I'm in no hurry to die. I have so much I want to do first.

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Stephen Hawking

People who boast about their I.Q. are losers.

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Stephen Hawking

My goal is simple. It is a complete understanding of the universe, why it is as it is and why it exists at all.

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Stephen Hawking

The whole history of science has been the gradual realization that events do not happen in an arbitrary manner, but that they reflect a certain underlying order, which may or may not be divinely inspired.

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Stephen Hawking

We only have to look at ourselves to see how intelligent life might develop into something we wouldn't want to meet.

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Stephen Hawking

Why are we here? Where do we come from? Traditionally, these are questions for philosophy, but philosophy is dead.

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Stephen Hawking

Work gives you meaning and purpose and life is empty without it.

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Stephen Hawking

To confine our attention to terrestrial matters would be to limit the human spirit.

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Stephen Hawking

If aliens visit us, the outcome would be much as when Columbus landed in America, which didn't turn out well for the Native Americans.

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Stephen Hawking

It is not clear that intelligence has any long-term survival value.

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Stephen Hawking

Time travel used to be thought of as just science fiction, but Einstein's general theory of relativity allows for the possibility that we could warp space-time so much that you could go off in a rocket...

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Stephen Hawking

Even if there is only one possible unified theory, it is just a set of rules and equations. What is it that breathes fire into the equations and makes a universe for them to describe?

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Stephen Hawking

There is no heaven or afterlife for broken-down computers; that is a fairy story for people afraid of the dark.

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Stephen Hawking

One cannot really argue with a mathematical theorem.

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Stephen Hawking

If we do discover a complete theory, it should be in time understandable in broad principle by everyone. Then we shall all, philosophers, scientists, and just ordinary people be able to take part in the...

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Stephen Hawking

Although September 11 was horrible, it didn't threaten the survival of the human race, like nuclear weapons do.

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Stephen Hawking

It is no good getting furious if you get stuck. What I do is keep thinking about the problem but work on something else. Sometimes it is years before I see the way forward. In the case of information loss...

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Stephen Hawking

It is generally recognised that women are better than men at languages, personal relations and multi-tasking, but less good at map-reading and spatial awareness. It is therefore not unreasonable to suppose...

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Stephen Hawking

There is no unique picture of reality.

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Stephen Hawking

Science is not only a disciple of reason but, also, one of romance and passion.

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Stephen Hawking

Most sets of values would give rise to universes that, although they might be very beautiful, would contain no one able to wonder at that beauty.

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Stephen Hawking

Scientists have become the bearers of the torch of discovery in our quest for knowledge.

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Stephen Hawking

I believe in universal health care. And I am not afraid to say so.

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Stephen Hawking

There are grounds for cautious optimism that we may now be near the end ofthe search for the ultimate laws of nature.

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Stephen Hawking

There is a real danger that computers will develop intelligence and take over. We urgently need to develop direct connections to the brain so that computers can add to human intelligence rather than be...

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Stephen Hawking

I don't want to write an autobiography because I would become public property with no privacy left.

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Stephen Hawking

With genetic engineering, we will be able to increase the complexity of our DNA, and improve the human race. But it will be a slow process, because one will have to wait about 18 years to see the effect...

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Stephen Hawking

I don't think the human race will survive the next thousand years, unless we spread into space.

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Stephen Hawking

I want to know why the universe exists, why there is something greater than nothing.

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Stephen Hawking

Theology is unnecessary.

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Stephen Hawking

Philosophers have not kept up with modern developments in science. Particularly physics.

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Stephen Hawking

The radiation left over from the Big Bang is the same as that in your microwave oven but very much less powerful. It would heat your pizza only to minus 271.3*C - not much good for defrosting the pizza,...

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Stephen Hawking

No one can resist the idea of a crippled genius.

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Stephen Hawking

The universe is governed by science. But science tells us that we can't solve the equations, directly in the abstract.

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Stephen Hawking

There are too many accidents that can befall life on a single planet.

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Stephen Hawking

I enjoy all forms of music - pop, classical and opera.

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Stephen Hawking

Someone told me that each equation I included in the book would halve the sales.

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Stephen Hawking

You can't regulate every lab in the world.

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Stephen Hawking

Obviously, because of my disability, I need assistance. But I have always tried to overcome the limitations of my condition and lead as full a life as possible. I have traveled the world, from the Antarctic...

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Stephen Hawking

Science predicts that many different kinds of universe will be spontaneously created out of nothing. It is a matter of chance which we are in.

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Stephen Hawking

Among physicists, I'm respected I hope.

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Stephen Hawking

I used to think information was destroyed in black hole. This was my biggest blunder, or at least my biggest blunder in science.

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Stephen Hawking

Maybe I don't have the most common kind of motor neuron disease, which usually kills in two or three years.

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Stephen Hawking

Observations indicate that the universe is expanding at an ever increasing rate. It will expand forever, getting emptier and darker.

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Stephen Hawking

All my adult life people have been helping me.

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Stephen Hawking

Using e-mail, I can communicate with scientists all over the world.

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Stephen Hawking

We think we have solved the mystery of creation. Maybe we should patent the universe and charge everyone royalties for their existence.

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Stephen Hawking

The usual approach of science of constructing a mathematical model cannot answer the questions of why there should be a universe for the model to describe. Why does the universe go to all the bother of...

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Stephen Hawking

Evolution has ensured that our brains just aren't equipped to visualise 11 dimensions directly. However, from a purely mathematical point of view it's just as easy to think in 11 dimensions, as it is to...

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Stephen Hawking

I think the brain is essentially a computer and consciousness is like a computer program. It will cease to run when the computer is turned off. Theoretically, it could be re-created on a neural network,...

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Stephen Hawking

I would like nuclear fusion to become a practical power source. It would provide an inexhaustible supply of energy, without pollution or global warming.

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Stephen Hawking

I believe everyone should have a broad picture of how the universe operates and our place in it. It is a basic human desire. And it also puts our worries in perspective.

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Stephen Hawking

In Britain, like most of the developed world, stem-cell research is regarded as a great opportunity. America will be left behind if it doesn't change policy.

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Stephen Hawking

The media need superheroes in science just as in every sphere of life, but there is really a continuous range of abilities with no clear dividing line.

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Stephen Hawking

There should be no boundaries to human endeavor. However bad life may seem, there is always hope.

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Stephen Hawking

I thought Eddie Redmayne portrayed me very well... At times I thought he was me.

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Stephen Hawking

There is a fundamental difference between religion, which is based on authority, and science, which is based on observation and reason. Science will win because it works.

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Stephen Hawking

We are only the temporary custodians of the particles which we are made of. They will go on to lead a future existence in the enormous universe that made them

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Stephen Hawking

One, remember to look up at the stars and not down at your feet. Two, never give up work. Work gives you meaning and purpose and life is empty without it. Three, if you are lucky enough to find love, remember...

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Stephen Hawking

Sometimes I wonder if I'm as famous for my wheelchair and disabilities as I am for my discoveries

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Stephen Hawking

Only time - whatever that may be - will tell.

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Stephen Hawking

Without imperfection, you or I would not exist.

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Stephen Hawking

Unless mankind redesigns itself by changing our DNA through altering our genetic makeup, computer-genera ted robots will take over our world.

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Stephen Hawking

The universe doesn't allow perfection.

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Stephen Hawking

All of my life, I have been fascinated by the big questions that face us, and have tried to find scientific answers to them. If, like me, you have looked at the stars, and tried to make sense of what you...

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Stephen Hawking

A lot of prizes have been awarded for showing the universe is not as simple as we might have thought.

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Stephen Hawking

We only have to look at ourselves to see how intelligent life might develop into something we wouldnt want to meet. I imagine they might exist in massive ships, having used up all the resources from their...

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Stephen Hawking

I think computer viruses should count as life,

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Stephen Hawking

It matters that you don't just give up,

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Stephen Hawking

What was God doing before the divine creation? Was he preparing hell for people who asked such questions?

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Stephen Hawking

Before we understand science, it is natural to believe that God created the universe. But now science offers a more convincing explanation.

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Stephen Hawking

What is important is that we have the ability to create.

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Stephen Hawking

What I meant by 'we would know the mind of God' is, we would know everything that God would know, if there were a God. Which there isn't. I'm an atheist.

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Stephen Hawking

The development of full artificial intelligence could spell the end of the human race.

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Stephen Hawking

Religion believes in miracles, but these aren't compatible with science.

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Stephen Hawking

Our population and our use of the finite resources of planet Earth are growing exponentially, along with our technical ability to change the environment for good or ill. But our genetic code still carries...

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Stephen Hawking

The past, like the future, is indefinite and exists only as a spectrum of possibilities.

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Stephen Hawking

It is all right to make mistakes; nothing is perfect because with perfection, we would not exist.

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Stephen Hawking

The increase of disorder or entropy is what distinguishes the past from the future, giving a direction to time.

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Stephen Hawking

The meaning in life is not out there but inbetween our ears. In many ways this makes us the lords of creation.

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Stephen Hawking

We have made remarkable progress in the last hundred years, but if we want to continue, our future is in space.

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Stephen Hawking

Science is beautiful when it makes simple explanations of phenomena or connections between different observations.

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Stephen Hawking

I don't know what my IQ is. People who gloat about their IQ's are losers

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Stephen Hawking

The world has changed far more in the past 100 years than in any other century in history. The reason is not political or economic but technological-technologies that flowed directly from advances in basic...

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Stephen Hawking

I like physics, but I love cartoons.

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Stephen Hawking

It is impossible to imagine a four-dimensional space. I personally find it hard enough to visualize a three-dimensional space!

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Stephen Hawking

We are entering an increasingly dangerous period of our history. But I'm an optimist.

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Stephen Hawking

The boundary condition of the universe is that it has no boundary.

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Stephen Hawking

As we shall see, the concept of time has no meaning before the beginning of the universe. This was first pointed out by St. Augustine. When asked: What did God do before he created the universe? Augustine...

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Stephen Hawking

One can imagine that God created the universe at literally any time in the past. On the other hand, if the universe is expanding, there may be physical reasons why there had to be a beginning. One could...

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Stephen Hawking

The question is: is the way the universe began chosen by God for reasons we can't understand, or was it determined by a law of science? I believe the second. If you like, you can call the laws of science...

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Stephen Hawking

My advice to other disabled people would be, concentrate on things your disability doesn't prevent you doing well, and don't regret the things it interferes with. Don't be disabled in spirit, as well as...

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Stephen Hawking

I put a lot of effort into writing 'A Briefer History' at a time when I was critically ill with pneumonia because I think that it's important for scientists to explain their work, particularly in cosmology....

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Stephen Hawking

When I was first diagnosed with ALS, I was given two years to live. Now 45 years later, I am doing pretty well.

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Stephen Hawking

There ought to be something very special about the boundary conditions of the universe and what can be more special than that there is no boundary?

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Stephen Hawking

I don't believe that the ultimate theory will come by steady work along existing lines. We need something new. We can't predict what that will be or when we will find it because if we knew that, we would...

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Stephen Hawking

For millions of years, mankind lived just like the animals. Then something happened which unleashed the power of our imagination. We learned to talk and we learned to listen.

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Stephen Hawking

It is a waste of time to be angry about my disability. One has to get on with life and I haven't done badly. People won't have time for you if you are always angry or complaining.

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Stephen Hawking

I'm not religious in the normal sense. I believe the universe is governed by the laws of science. The laws may have been decreed by God, but God does not intervene to break the laws.

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Stephen Hawking

We shouldn't be surprised that conditions in the universe are suitable for life, but this is not evidence that the universe was designed to allow for life. We could call order by the name of God, but it...

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Stephen Hawking

The life we have on Earth must have spontaneously generated itself. It must therefore be possible for life to generate spontaneously elsewhere in the universe.

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Stephen Hawking

I think [contacting an alien civilization] would be a disaster. The extraterrestrials would probably be far in advance of us. The history of advanced races meeting more primitive people on this planet...

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Stephen Hawking

I am discounting reports of UFOs. Why would they appear only to cranks and weirdos?

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Stephen Hawking

We see the universe the way it is because we exist.

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Stephen Hawking

One might think this means that imaginary numbers are just a mathematical game having nothing to do with the real world. From the viewpoint of positivist philosophy, however, one cannot determine what...

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Stephen Hawking

It is said that there's no such thing as a free lunch. But the universe is the ultimate free lunch.

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Stephen Hawking

A model is a good model if first it interprets a wide range of observations in terms of a simple and elegant model, and second if the model makes definite predictions that can be tested, and possibly falsified,...

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Stephen Hawking

I think the universe was spontaneously created out of nothing, according to the laws of science. It has no beginning and no end.

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Stephen Hawking

Observations indicate that the universe is expanding at an ever-increasing rate. It will expand forever, getting emptier and darker. Although the universe doesn't have an end, it had a beginning in the...

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Stephen Hawking

If we ever do find a complete theory of the universe, it would be a great triumph of human reason but it wouldn't leave much for us to do. We need an intellectual challenge.

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Stephen Hawking

The human race is just a chemical scum on a moderate-sized planet, orbiting around a very average star in the outer suburb of one among a hundred billion galaxies. We are so insignificant that I can't...

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Stephen Hawking

In a world that is in chaos politically, socially and environmentally, how can the human race sustain another 100 years?

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Stephen Hawking

Look up at the stars, not down at your feet.

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Stephen Hawking

To my mathematical brain, the numbers alone make thinking about aliens perfectly rational,

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Stephen Hawking

I think the next century will be the century of complexity.

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Stephen Hawking

What lies north of the North Pole?

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Stephen Hawking

Because there is a law such as gravity, the Universe can and will create itself from nothing.

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Stephen Hawking

The real challenge is to work out what aliens might actually be like.

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Stephen Hawking

If a superior alien civilization sent us a message saying, 'We'll arrive in a few decades', would we just reply, 'OK, call us when you get here – we'll leave the lights on'? Probably not – but this...

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Stephen Hawking

I wouldnt be here today if it were not for the NHS, I have received a large amount of high-quality treatment without which I would not have survived.

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Stephen Hawking

So next time someone complains that you have made a mistake, tell him that may be a good thing. Because without imperfection, neither you nor I would exist

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Stephen Hawking

It would be very difficult to explain why the universe should have begun in just this way, except as the act of a God who intended to create beings like us

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Stephen Hawking

To boldly go where no one has gone before

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Stephen Hawking

Just like a computer, we must remember things in the order in which entropy increases. This makes the second law of thermodynamics almost trivial. Disorder increases with time because we measure time in...

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Stephen Hawking

Our only chance of long-term survival is not to remain lurking on planet Earth, but to spread out into space.

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Stephen Hawking

We won't know for a few years.

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Stephen Hawking

I think the next [21st] century will be the century of complexity. We have already discovered the basic laws that govern matter and understand all the normal situations. We don't know how the laws fit...

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Stephen Hawking

If one is physically disabled, one cannot afford to be *psychologically* disabled as well.

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Stephen Hawking

There are no black holes - in the sense of regimes from which light can't escape to infinity. There are however apparent horizons which persist for a period of time.

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Stephen Hawking

[In the Universe it may be that] Primitive life is very common and intelligent life is fairly rare. Some would say it has yet to occur on Earth.

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Stephen Hawking

Now, radical forward thinking is offering hope for the future: Replacement body parts to order. A team of scientists in California believe that if you can design them on a computer, you should be able...

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Stephen Hawking

A theory is a good theory if it satisfies two requirements: it must accurately describe a large class of observations on the basis of a model that contains only a few arbitrary elements, and it must make...

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Stephen Hawking

Why does the universe go to all the bother of existing?

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Stephen Hawking

What could define God, [is thinking of God] as the embodiment of the laws of nature. However, this is not what most people would think of that God. They made a human-like being with whom one can have...

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Stephen Hawking

One does not have to appeal to God to set the initial conditions for the creation of the universe, but if one does He would have to act through the laws of physics.

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Related quote

Stephen Hawking

One might think this means that imaginary numbers are just a mathematical game having nothing to do with the real world. From the viewpoint of positivist philosophy, however, one cannot determine what...

Read more


Gregg Braden

In addition to pumping the blood of life within our bodies, we may think of the heart as a belief-to-matter translator. It converts the perceptions of our experiences, beliefs, and imagination into the...

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Martin Gardner

Mathematics is not only real, but it is the only reality. That is that entire universe is made of matter, obviously. And matter is made of particles. It's made of electrons and neutrons and protons. So...

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Gregg Braden

The distinction between what is real and what is imaginary is not one that can be finely maintained ... all existing thing are ... imaginary.

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John D. Barrow

All our surest statements about the nature of the world are mathematical statements, yet we do not know what mathematics "is"... and so we find that we have adapted a religion strikingly similar to many...

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Galileo Galilei

Philosophy [nature] is written in that great book which ever is before our eyes -- I mean the universe -- but we cannot understand it if we do not first learn the language and grasp the symbols in which...

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John von Neumann

The sciences do not try to explain, they hardly even try to interpret, they mainly make models. By a model is meant a mathematical construct which, with the addition of certain verbal interpretations,...

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Don DeLillo

We feel certain that the extraterrestrial message is a mathematical code of some kind. Probably a number code. Mathematics is the one language we might conceivably have in common with other forms of intelligent...

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John Arbuthnot

The Reader may here observe the Force of Numbers, which can be successfully applied, even to those things, which one would imagine are subject to no Rules. There are very few things which we know, which...

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William Whewell

The hypotheses which we accept ought to explain phenomena which we have observed. But they ought to do more than this; our hypotheses ought to foretell phenomena which have not yet been observed; ... because...

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Jose Ortega y Gasset

The metaphor is perhaps one of man's most fruitful potentialities. Its efficacy verges on magic, and it seems a tool for creation which God forgot inside one of His creatures when He made him. All our...

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Paul Lockhart

The mathematical question is "Why?" It's always why. And the only way we know how to answer such questions is to come up, from scratch, with these narrative arguments that explain it. So what I want to...

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Brandon Sanderson

Too many scholars think of research as purely a cerebral pursuit. If we do nothing with the knowledge we gain, then we have wasted our study. Books can store information better than we can--what we we...

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Bob Geldof

Because we can't comprehend it, and that's what allows us to do it again. And it is the normal, it's the average person that can do this. Again, in an imaginary other universe, maybe we'd have done it....

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Gilbert K. Chesterton

The real trouble with this world of ours is not that it is an unreasonable world, nor even that it is a reasonable one. The commonest kind of trouble is that it is nearly reasonable, but not quite. ......

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David Foster Wallace

The capital-T Truth is about life BEFORE death. It is about the real value of a real education, which has almost nothing to do with knowledge, and everything to do with simple awareness; awareness of what...

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Anna Funder

This vast life - the real, interior one in which we remain linked to the dead (because the dream inside us ignores trivialities like breath, or absence) - this vast life is not under our control. Everything...

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Jane Austen

Pride is a very common failing, I believe. By all that I have ever read, I am convinced that it is very common indeed, that human nature is particularly prone to it, and that there are very few of us who...

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Terry Goodkind

To exist in this vast universe for a speck of time is the great gift of life. Our tiny sliver of time is our gift of life. It is our only life. The universe will go on, indifferent to our brief existence,...

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David Wilcock

The goal of the Creator is for each entity to make a conscious choice to again seek Oneness, out of our own free will - not because anyone else forced us to. If we are told what to do and what to believe,...

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Charles Hermite

There exists, if I am not mistaken, an entire world which is the totality of mathematical truths, to which we have access only with our mind, just as a world of physical reality exists, the one like the...

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“Don't cry because it's over, smile because it happened.”

― Dr. Seuss