The soul suffers when the body is diseased or traumatized, while the body suffers when the soul is ailing.

Happiness lies in virtuous activity, and perfect happiness lies in the best activity, which is contemplative

The moral virtues, then, are produced in us neither by nature nor against nature. Nature, indeed, prepares in us the ground for their reception, but their complete formation is the product of habit.

... the good for man is an activity of the soul in accordance with virtue, or if there are more kinds of virtue than one, in accordance with the best and most perfect kind.

In a democracy the poor will have more power than the rich, because there are more of them, and the will of the majority is supreme.

It is of the nature of desire not to be satisfied, and most men live only for the gratification of it.

Friendship is a thing most necessary to life, since without friends no one would choose to live, though possessed of all other advantages.