Man perfected by society is the best of all animals; he is the most terrible of all when he lives without law, and without justice.

No one praises happiness as one praises justice, but we call it a 'blessing,' deeming it something higher and more divine than things we praise.

No one who desires to become good will become good unless he does good things.

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

The student of politics therefore as well as the psychologist must study the nature of the soul.

The soul is the cause or source of the living body. The terms cause and source have many senses. But the soul is the cause of its body alike in all three senses which we explicitly recognize. It is (a) the source or origin of movement, it is (b) the end, it is (c) the essence of the whole living body.

If, then, there is some end of the things we do, which we desire for its own sake (everything else being desired for the sake of this), and if we do not choose everything for the sake of something else (for at that rate the process would go on to infinity, so that our desire would be empty and vain), clearly this must be the good and the chief good.