I think that the discovery of antimatter was perhaps the biggest jump of all the big jumps in physics in our century.

You may object that by speaking of simplicity and beauty I am introducing aesthetic criteria of truth, and I frankly admit that I am strongly attracted by the simplicity and beauty of mathematical schemes which nature presents us. You must have felt this too: the almost frightening simplicity and wholeness of the relationship, which nature suddenly spreads out before us.

We will have to abandon the philosophy of Democritus and the concept of elementary particles. We should accept instead the concept of elementary symmetries.

Thus, the more precisely the position is determined, the less precisely the momentum is known, and conversely.

An expert is someone who knows some of the worst mistakes that can be made in his subject and how to avoid them.

The problems of language here are really serious. We wish to speak in some way about the structure of the atoms. But we cannot speak about atoms in ordinary language.

Even for the physicist the description in plain language will be a criterion of the degree of understanding that has been reached.