"I am firmly convinced that we must never judge political movements by their aims, no matter how loudly proclaimed or how sincerely upheld, but only by the means they use to realize these aims."

"The atoms or elementary particles themselves are not real; they form a world of potentialities or possibilities rather than one of things or facts."

"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 neighboring par…"

"Modern physics has, in a certain sense, revived Plato's philosophy of forms in the atomic world."

"The positivists have a simple solution: the world must be divided into that which we can say clearly and the rest, which we had better pass over in silence. But can anyone conceive of a more pointless…"