The greatest genius will not be worth much if he pretends to draw exclusively from his own resources

Make the most of time, it flies away so fast; yet method will teach you to win time.

No one has ever learned fully to know themselves.

It is in the half fools and the half wise that the greatest danger lies.

Old age is never honored among us, but only indulged, as childhood is; and old men lose one of the most precious rights of man,--that of being judged by their peers.

If man thinks about his physical or moral state he usually discovers that he is ill.

We all walk in mysteries. We are surrounded by an atmosphere about which we still know nothing at all.