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

Some things are so serious, they can only be joked about.

A physicist is just an atom's way of looking at itself.

The best weapon of a dictatorship is secrecy, but the best weapon of a democracy should be the weapon of openness.

When it comes to atoms, language can be used only as in poetry. The poet, too, is not nearly so concerned with describing facts as with creating images and establishing mental connections.

We are trapped by language to such a degree that every attempt to formulate insight is a play on words.

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