A young man is not a proper hearer of lectures on political science; for he is inexperienced in the actions that occur in life, but its discussions start from these and are about these; and, further, since he tends to follow his passions, his study will be vain and unprofitable, because the end that is aimed at is not knowledge but action. And it makes no difference whether he is young in years or youthful in character.

The more you know, the more you know you don't know.

Love is the cause of unity in all things.

Happiness depends on ourselves.

It is not easy for a person to do any great harm when his tenure of office is short, whereas long possession begets tyranny.

Knowing what is right does not make a sagacious man.

The first principle of all action is leisure.