If you want to find out anything from the theoretical physicists about the methods they use, I advise you to stick closely to one principle: don't listen to their words, fix your attention on their deeds. To him who is a discoverer in this field the products of his imagination appear so necessary and natural that he regards them, and would like to have them regarded by others, not as creations of thought but as given realities.

No amount of experimentation can ever prove me right; a single experiment can prove me wrong.

He who can no longer pause to wonder and stand rapt in awe, is as good as dead; his eyes are closed.

Academic chairs are many, but wise and noble teachers are few; lecture-rooms are numerous and large, but the number of young people who genuinely thirst after truth and justice is small

Art is the expression of the profoundest thoughts in the simplest way.

The enormous mental resilience, without which no Chess player can exist, was so much taken up by Chess that he could never free his mind of this game

The gift of fantasy has meant more to me than my talent for absorbing positive knowledge.