The greater the difficulty, the greater the glory.

For out of such an ungoverned populace one is usually chosen as a leader, someone bold and unscrupulous who curries favor with the people by giving them other men's property. To such a man the protection of public office is given, and continually renewed. He emerges as a tyrant over the very people who raised him to power.

Philosophy is the true mother of science.

To be ignorant of the past is to be forever a child.

In fact the whole passion ordinarily termed love (and heaven help me if I can think of any other term to apply to it) is of such exceeding triviality that I see nothing that I think comparable with it.

Virtue is a habit of the mind, consistent with nature and moderation and reason.

A tear dries quickly when it is shed for troubles of others.