...The entire preoccupation of the physicist is with things that contain within themselves a principle of movement and rest.

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

Of the irrational part of the soul again one division appears to be common to all living things, and of a vegetative nature.

The honors and rewards fall to those who show their good qualities in action.

Tragedy is an imitation not of men but of a life, an action

Those who cannot bravely face danger are the slaves of their attackers.

The first essential responsibility of the state is control of the market-place: there must be some official charged with the duty of seeing that honest dealing and good order prevail. For one of the well-nigh essential activities of all states is the buying and selling of goods to meet their mutual basic needs; this is the quickest way to self-sufficiency, which seems to be what moves men to combine under a single constitution.