Prediction is very difficult, especially about the future.

It is the hallmark of any deep truth that its negation is also a deep truth.

A person who wasn't outraged on first hearing about quantum theory didn't understand what had been said.

No paradox, no progress.

An expert is someone who knows some of the worst mistakes, which can be made, in a very narrow field.

If an idea does not appear bizarre, there is no hope for it.

If we couldn't laugh at ourselves, that would be the end of everything.

Humanity will... be confronted with dangers of unprecedented character unless, in due time, measures can be taken to forestall a disastrous competition in such formidable armaments and to establish an international control of the manufacture and use of the powerful materials.

While the finish given to our picture of the world by the theory of relativity has already been absorbed into the general scientific consciousness, this has scarcely occurred to the same extent with those aspects of the general problem of knowledge which have been elucidated by the quantum theory.

If you aren't confused by quantum mechanics, you haven't really understood it.

No, no, you're not thinking; you're just being logical.

There are two sorts of truth: trivialities, where opposites are clearly absurd, and profound truths, recognised by the fact that the opposite is also a profound truth.

Everything we call real is made of things that cannot be regarded as real.

Technology has advanced more in the last thirty years than in the previous two thousand. The exponential increase in advancement will only continue.

An expert is a man who has made all the mistakes which can be made in a very narrow field.

Technology has advanced more in the last thirty years than in the previous two thousand. The exponential increase in advancement will only continue. Anthropological Commentary The opposite of a trivial truth is false; the opposite of a great truth is also true.

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

Every valuable human being must be a radical and a rebel, for what he must aim at is to make things better than they are.

You can recognize a small truth because its opposite is a falsehood. The opposite of a great truth is another truth.

Anybody who is not shocked by this subject has failed to understand it. of quantum mechanics.