Cowardice is the mother of cruelty.

We do not marry for ourselves, whatever we say; we marry just as much or more for our posterity, for our family. The practice and benefit of marriage concerns our race very far beyond us.

Philosophical discussions habitually make men happy and joyful not frowning and sad.

We must learn to suffer what we cannot evade; our life, like the harmony of the world, is composed of contrary things, and one part is no less necessary than the other.

There is no desire more natural than the desire of knowledge. (Il n'est desir plus naturel que le desir de connaissance)

Glory consists of two parts: the one in setting too great a value upon ourselves, and the other in setting too little a value upon others.

Pleasure itself is painful at the bottom.