The man with insight enough to admit his limitations comes nearest to perfection.

There is nothing so terrible as activity without insight.

If you wish to know the mind of a man, listen to his words.

A man's manners are a mirror in which he shows his portrait.

The most happy man is he who knows how to bring into relation the end and beginning of his life.

If a man writes a book, let him set down only what he knows. I have guesses enough of my own.