What in us the women leave uncultivated, children cultivate when we retain them near us.

The artist may be well advised to keep his work to himself till it is completed, because no one can readily help him or advise him with it... but the scientist is wiser not to withhold a single finding or a single conjecture from publicity.

It is a mistake for a taciturn, serious-minded woman to marry a jovial man, but not for a serious-minded man to marry a lighthearted woman.

Normally, the sciences distance themselves from life and the return to it via a detour.

Every reader, if he has a strong mind, reads himself into the book, and amalgamates his thoughts with those of the author.

Men are joined by conviction, sundered by opinion.

Do not, I beg you, look for anything behind phenomena. They are themselves their own lesson.