Only the refined and delicate pleasures that spring from research and education can build up barriers between different ranks.

Life, for me, is living among my friends.

When women oppose themselves to the projects and ambition of men, they excite their lively resentment; if in their youth they meddle with political intrigues, their modesty must suffer.

Enthusiasm gives life to what is invisible; and interest to what has no immediate action on our comfort in this world.

The education of life perfects the thinking mind, but depraves the frivolous.

Scientific progress makes moral progress a necessity; for if man's power is increased, the checks that restrain him from abusing it must be strengthened.

It seems to me that we become more dear one to the other, in together admiring works of art, which speak to the soul by their true grandeur.