Neither acquiescence in skepticism nor acquiescence in dogma is what education should produce.

Abstract work, if one wishes to do it well, must be allowed to destroy one's humanity; one raises a monument which is at the same time a tomb, in which, voluntarily, one slowly inters oneself.

Modern life cannot be constructed on . . . physically strenuous principles. A great deal of work is sedentary, and most manual work exercises only a few specialized muscles.

Logic must no more admit a unicorn than zoology can.

Thinking you know when in fact you don't is a fatal mistake, to which we are all prone

Either man will abolish war, or war will abolish man.

For my part I distrust all generalizations about women, favorable and unfavorable, masculine and feminine, ancient and modern; all alike, I should say, result from paucity of experience.