Often one postulates that a priori, all states are equally probable. This is not true in the world as we see it. This world is not correctly described by the physics which assumes this postulate.

The wide world is all about you: you can fence yourselves in, but you cannot forever fence it out.

The world has crafted a beautiful balance of collective action – common but differentiated responsibility and respective capabilities.

The companies that work are the ones that people really care about and have a vision for the world so do something you like.

I think we all change each other’s paths. I don’t know which law idea that is in physics, but I don’t think any of us can live without affecting one another.

It is not materialism that is the chief curse of the world, as pastors teach, but idealism. Men get into trouble by taking their visions and hallucinations too seriously.

I am so tired of fear. And I don’t want my girls to live in a country, in a world, based on fear.

The answer to many of the domestic problems we face is not higher taxes and more spending. It is less waste, more results and greater freedom for the individual American to earn a rightful place in his own community – and for States and localities to address their own needs in their own ways, in the light of their own priorities.

We live in a world that has narrowed into a neighborhood before it has broadened into a brotherhood.

First, how do we give everyone a fair shot at opportunity and security in this new economy? Second, how do we make technology work for us, and not against us – especially when it comes to solving urgent challenges like climate change? Third, how do we keep America safe and lead the world without becoming its policeman?

There is no physical law precluding particles from being organised in ways that perform even more advanced computations than the arrangements of particles in human brains.

We inhabit a universe that is characterized by diversity.

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.

Before 1915, space and time were thought of as a fixed arena in which events took place, but which was not affected by what happened in it. Space and time are now dynamic quantities… space and time not only affect but are also affected by everything that happens in the universe.

I am the astronaut of boxing. Joe Louis and Dempsey were just jet pilots. I’m in a world of my own.

The world is never quiet, even its silence eternally resounds with the same notes, in vibrations which escape our ears. As for those that we perceive, they carry sounds to us, occasionally a chord, never a melody.

We have real enemies in the world. These enemies must be found. They must be pursued and they must be defeated.

Everything starts somewhere, although many physicists disagree.

There were several possible solutions of the difficulty of classical electrodynamics, any one of which might serve as a good starting point to the solution of the difficulties of quantum electrodynamics.

No book includes the entire world. It’s limited. And so it doesn’t seem like an aesthetic compromise to have to do that. There’s so much other material to write about.

We think that life develops spontaneously on Earth, so it must be possible for life to develop on suitable planets elsewhere in the universe. But we don’t know the probability that a planet develops life.

We’re going to have the best-educated American people in the world.

Driven by the forces of love, the fragments of the world seek each other so that the world may come to being.

I knew I belonged to the public and to the world, not because I was talented or even beautiful, but because I had never belonged to anything or anyone else.

My home is in Heaven. I’m just traveling through this world.

If you read history you will find that the Christians who did most for the present world were precisely those who thought most of the next. It is since Christians have largely ceased to think of the other world that they have become so ineffective in this.

My discovery that black holes emit radiation raised serious problems of consistency with the rest of physics. I have now resolved these problems, but the answer turned out to be not what I expected.

The probability that we may fail in the struggle ought not to deter us from the support of a cause we believe to be just.

For ninety per cent of those who view him from outside, the Christian God looks like a great landowner administering his estates, the world. Now this conventional picture, which is too well justified by appearances, corresponds in no way to the dogmatic basis or point of view of the Gospels.

I tell you the solemn truth, that the doctrine of the Trinity is not so difficult to accept for a working proposition as any one of the axioms of physics.

For the world to be interesting, you have to be manipulating it all the time.

They say the universe is expanding. That should help with the traffic.

The world is before you and you need not take it or leave it as it was when you came in.

Most people want security in this world, not liberty.

This world, after all our science and sciences, is still a miracle wonderful, inscrutable, magical and more, to whosoever will think of it.

My first popular book, ‚A Brief History of Time,‘ aroused a great deal of interest, but many found it difficult to understand.

The true and the approximately true are apprehended by the same faculty; it may also be noted that men have a sufficient natural instinct for what is true, and usually do arrive at the truth. Hence the man who makes a good guess at truth is likely to make a good guess at probabilities.

War is the greatest plague that can afflict humanity, it destroys religion, it destroys states, it destroys families. Any scourge is preferable to it.

Suffering is the positive element in this world, indeed it is the only link between this world and the positive.

I just think people should invest in the world. Don’t invest in fashion, but invest in the world.

We get the exciting result that the total energy of the universe is zero. Why this should be so is one of the great mysteries – and therefore one of the important questions of physics. After all, what would be the use of studying physics if the mysteries were not the most important things to investigate?

States are as the men, they grow out of human characters.

First and foremost comes my family and my life with Brad. We have so much joy in raising our children and teaching them about the world that nothing really compares to that.

I’ve never written a political song. Songs can’t save the world. I’ve gone through all that.

Personal success or personal satisfaction are not worth another thought if one does achieve them, or worth worrying about if they evade one or are slow in coming. All that is really worth while is action – faithful action, for the world, and in God.

I hope I have helped to raise the profile of science and to show that physics is not a mystery but can be understood by ordinary people.

Today I can declare my hope and declare it from the bottom of my heart that we will eventually see the time when that number of nuclear weapons is down to zero and the world is a much better place.

My childhood did not prepare me for the fact that the world is full of cruel and bitter things.

Whatever America hopes to bring to pass in the world must first come to pass in the heart of America.

The greatest heroes are those who do their duty in the daily grind of domestic affairs whilst the world whirls as a maddening dreidel.

The view of Jerusalem is the history of the world; it is more, it is the history of earth and of heaven.

Physics has a history of synthesizing many phenomena into a few theories.

There could be no fairer destiny for any physical theory than that it should point the way to a more comprehensive theory in which it lives on as a limiting case.

This land is your land and this land is my land, sure, but the world is run by those that never listen to music anyway.

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 that women might be less good at mathematics and physics.

I would have written of me on my stone: I had a lover’s quarrel with the world.

I happen to believe there is evil in the world.

We are the product of quantum fluctuations in the very early universe.

America is never wholly herself unless she is engaged in high moral principle. We as a people have such a purpose today. It is to make kinder the face of the nation and gentler the face of the world.

The probability of apocalypse soon cannot be realistically estimated, but it is surely too high for any sane person to contemplate with equanimity.

I am in the world feeling my way to light ‚amid the encircling gloom.‘