Fortunately, nature is as generous with its problems as Nobel with his fortune. The more we know, the more aware we are of what we know not.

Theorists can be wrong; only nature is always right.

I strongly believe that the fundamental laws of nature are not emergent phenomena.

Reading history, one rarely gets the feeling of the true nature of scientific development, in which the element of farce is as great as the element of triumph.

Actually, I was more or less determined to be a theoretical physicist at the age of thirteen.

The advice I tell students is to think about the big problems. I mean, work on anything you can work on where you can make progress. But always keep in mind the big problems.