One could count on one's fingers the number of scientists throughout the world with a general idea of the history and development of their particular science: there is none who is really competent as regards sciences other than his own. As science forms an indivisible whole, one may say that there are no longer, strictly speaking, scientists, but only drudges doing scientific work.

The same suffering is much harder to bear for a high motive than for a base one. The people [during World War II] who stood motionless, from one to eight in the morning, for the sake of having an egg, would have found it very difficult to do in order to save a human life.

If Germany, thanks to Hitler and his successors, were to enslave the European nations and destroy most of the treasures of their past, future historians would certainly pronounce that she had civilized Europe.

Love: To feel with one's whole self the existence of another being.

Renunciation is submission to time.

There is one, and only one, thing in modern society more hideous than crime namely, repressive justice.

Liberty, taking the word in its concrete sense, consists in the ability to choose.