If we ask, for instance, whether the position of the electron remains the same, we must say 'no'; if we ask whether the electron's position changes with time, we must say 'no'; if we ask whether the electron is at rest, we must say 'no'; if we ask whether it is in motion, we must say 'no'.

The physicists have known sin; and this is a knowledge which they cannot lose.

Any man whose errors take ten years to correct is quite a man.

A pragmatist is concerned with results, not reality.

If atomic bombs are to be added as new weapons to the arsenals of a warring world, or to the arsenals of nations preparing for war, then the time will come when mankind will curse the names of Los Alamos and Hiroshima. The people must unite or they will perish.

Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search.

Both the man of science and the man of action live always at the edge of mystery, surrounded by it.