The virtue as the art consecrates itself constantly to what's difficult to do, and the harder the task, the shinier the success.

The law is reason unaffected by desire.

We should venture on the study of every kind of animal without distaste; for each and all will reveal to us something natural and something beautiful.

Let us first understand the facts and then we may seek the cause.

All flatterers are mercenary, and all low-minded men are flatterers.

Equality consists in the same treatment of similar persons.

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.