Plato

The excessive increase of anything causes a reaction in the opposite direction.

All men are by nature equal, made all of the same earth by one Workman; and however we deceive ourselves, as dear unto God is the poor peasant as the mighty prince.

Any man may easily do harm, but not every man can do good to another.

I'm quite content to spend my life helping young people find themselves. I've had my fill of politics.

The person who talks most of his own virtue is often the least virtuous.

Every man has his own courage, and is betrayed because he seeks in himself the courage of other persons.