The greatest of all mysteries is the man himself.

This is...self-knowled ge-for a man to know what he knows, and what he does not know.

Wonder is the beginning of wisdom.

Whom do I call educated? First, those who manage well the circumstances they encounter day by day. Next, those who are decent and honorable in their intercourse with all men, bearing easily and good naturedly what is offensive in others and being as agreeable and reasonable to their associates as is humanly possible to be... those who hold their pleasures always under control and are not ultimately overcome by their misfortunes... those who are not spoiled by their successes, who do not desert their true selves but hold their ground steadfastly as wise and sober - minded men.

The body cannot be cured without regard for the soul.

Young people nowadays love luxury; they have bad manners and contempt for authority. They show disrespect for old people... contradict their parents, talk constantly in front of company, gobble their food and tyrannize their teachers.

He said that there was one only good, namely, knowledge; and one only evil, namely, ignorance.