What is not started today is never finished tomorrow.

People may live as much retired from the world as they please; but sooner or later, before they are aware, they will find themselves debtor or creditor to somebody.

A mathematician is only perfect insofar as he is a perfect man, sensitive to the beauty of truth.

A reasonable man needs only to practice moderation to find happiness.

Nature goes her own way, and all that to us seems an exception is really according to order.

The formation of one's character ought to be everyone's chief aim.

The highest happiness, the purest joys of life, wear out at last.