"The uncertainty principle refers to the degree of indeterminateness in the possible present knowledge of the simultaneous values of various quantities with which the quantum theory deals."

"The meaning of 'understanding' has changed in the course of the development of physics."

"I would say that I was absolutely convinced of the possibility of our making a uranium engine. but I never thought that we would make a bomb. and at the bottom of my heart. I was really glad that it w…"

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

"Our proposition that the physicists on both sides should not advance the production of atomic bombs, was thus indirectly, if one wants to exaggerate the point, a proposition in favor of Hitler."