Pleasure in the job puts perfection in the work.

These virtues are formed in man by his doing the actions ... The good of man is a working of the soul in the way of excellence in a complete life.

I have gained this from philosophy: that I do without being commanded what others do only from fear of the law.

Moral virtue is the quality of acting in the best way in relation to pleasures and pains, and that vice is the opposite.

Greatness of spirit is accompanied by simplicity and sincerity.

Tragedy, however, is an imitation not only of a complete action, but also of incidents arousing pity and fear.

Learning is not child's play; we cannot learn without pain.