“There are things that are so serious that you can only joke about them.”

“Revere those things beyond science which really matter and about which it is so difficult to speak.”

“Not only is the Universe stranger than we think, it is stranger than we can think.”

“Quantum theory provides us with a striking illustration of the fact that we can fully understand a connection though we can only speak of it in images and parables.”

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

“I think that modern physics has definitely decided in favor of Plato. In fact the smallest units of matter are not physical objects in the ordinary sense; they are forms, ideas which can be expressed unambiguously only in mathematical language.”

“I remember discussions with Bohr which went through many hours till very late at night and ended almost in despair; and when at the end of the discussion I went alone for a walk in the neighbouring park I repeated to myself again and again the question: Can nature possibly be so absurd as it seemed to us in these atomic experiments?”