No man is exempt from saying silly things; the mischief is to say them deliberately.

When I quote others I do so in order to express my own ideas more clearly.

The worst condition of humans is when they lose knowledge and control of themselves.

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.

Everyone calls barbarity what he is not accustomed to.

A learned man is not learned in all things; but a sufficient man is sufficient throughout, even to ignorance itself.

Teach him a certain refinement in sorting out and selecting his arguments, with an affection for relevance and so for brevity. Above all let him be taught to throw down his arms and surrender to truth as soon as he perceives it, whether the truth is born at his rival's doing or within himself from some change in his ideas.