"The existing scientific concepts cover always only a very limited part of reality, and the other part which has not yet been understood is infinite."

"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."

"If we want to describe what happens in an atomic event, we must realize that the word 'happens' can apply only to the observation, not to the state of affairs between two observations."

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

"The more precise the measurement of position, the more imprecise the measurement of momentum, and vice versa."