“Physics is the belief that a simple and consistent description of nature is possible.”

Never express yourself more clearly than you are able to think.

Our task is not to penetrate the essence of things, the meaning of which we do not know anyway, but rather to develop concepts which allow us to talk in a productive way about phenomena in nature

The opposite of every great idea is another great idea.

Einstein, stop telling God what to do!

Prediction is very difficult, especially if it’s about the future.

Anyone who can contemplate quantum mechanics without getting dizzy hasn’t understood it.

Nothing exists until it is measured.

It is not enough to be wrong, one must also be polite.

You must come to Copenhagen to work with us. We like people who can actually perform thought experiments!

No paradox, no progress.

There are trivial truths and the great truths. The opposite of a trivial truth is plainly false. The opposite of a great truth is also true.

Opposites are not contradictory but complementary.

The present state of atomic theory is characterized by the fact that we not only believe the existence of atoms to be proved beyond a doubt, but also we even believe that we have an intimate knowledge of the constituents of the individual atoms.

Oh what idiots we have all been, this is just as it must be.

Predition is risky, especially of the future.

Truth and clarity are complementary.

Few men realize that their life, the very essence of their character, their capabilities and their audacities, are only the expression of their belief in the safety of their surroundings.

Nature does not know extinction; all it knows is transformation. Everything science has taught me-and continues to teach me-strengthens my belief in the continuity of our spiritual existence after death. Nothing disappears without a trace.

There was no difference between the behavior of a god and the operations of pure chance.

So the universe is not quite as you thought it was. You’d better rearrange your beliefs, then. Because you certainly can’t rearrange the universe.

I always knew I would be successful. So there was no element of surprise.

And above all things, never think that you’re not good enough yourself. A man should never think that. My belief is that in life people will take you at your own reckoning.

And I don’t think that government has a role in telling people how to live their lives. Maybe a minister does, maybe your belief in God does, maybe there’s another set of moral codes, but I don’t think government has a role.

It was because of my great interest in the West, and my belief that its development would be assisted by the interest I could awaken in others, that I decided to bring the West to the East through the medium of the Wild West Show.