The search for causes must come after the collection of facts.

The production of a work of art is determined by the material and intellectual climate in which a man lives and dies.

The more I study the things of the mind the more mathematical I find them. In them as in mathematics it is a question of quantities; they must be treated with precision. I have never had more satisfaction than in proving this in the realms of art, politics and history.

To have a true idea of man or of life, one must have stood himself on the brink of suicide, or on the door-sill of insanity, at least once.

The search for causes must come after the collection of facts.

There are as many kinds of modesty as there are races. To the English woman it is a duty; to the French woman a propriety.

A fixed idea is like the iron rod which sculptors put in their statues. It impales and sustains.