Marriage, as practised by high society, is arranged indecency.

People are governed by the head; a kind heart is of little value in chess.

What one knows best is ... what one has learned not from books but as a result of books, through the reflections to which they have given rise.

I have three kinds of friends: those who love me, those who pay no attention to me, and those who detest me.

Change of fashion is the tax levied by the industry of the poor on the vanity of the rich.

Be my brother or I will kill you.

All that I've learned, I've forgotten. The little that I still know, I've guessed.