What we need is imagination, but imagination in a terrible strait-jacket.

I believe that a scientist looking at nonscientific problems is just as dumb as the next guy.

The present situation in physics is as if we know chess, but we don't know one or two rules.

Know your place in the world and evaluate yourself fairly, not in terms of the naïve ideals of your own youth, nor in terms of what you erroneously imagine your teacher's ideals are.

There was a time when the newspapers said that only twelve men understood the theory of relativity. I do not believe there ever was such a time ... On the other hand, I think I can safely say that nobody understands quantum mechanics.

Victory usually goes to those green enough to underestimate the monumental hurdles they are facing.

What we need is imagination, but imagination in a terrible strait-jacket.