Let reason govern desire.

No well-informed person has declared a change of opinion to be inconstancy.

Since an intelligence common to us all makes things known to us and formulates them in our minds, honorable actions are ascribed by us to virtue, and dishonorable actions to vice; and only a madman would conclude that these judgments are matters of opinion, and not fixed by nature.

Who can love the man he fears. or by who he thinks he is himself feared?

Superstition is an unreasoning fear of God.

Justice is the set and constant purpose which gives every man his due.

A happy life consists in tranquility of mind.