Happiness may be defined as good fortune joined to virtue, or a independence, or as a life that is both agreeable and secure.

Virtue means doing the right thing, in relation to the right person, at the right time, to the right extent, in the right manner, and for the right purpose. Thus, to give money away is quite a simple task, but for the act to be virtuous, the donor must give to the right person, for the right purpose, in the right amount, in the right manner, and at the right time.

The state comes into existence for the sake of life and continues to exist for the sake of good life.

Happiness is prosperity combined with virtue.

Anaximenes and Anaxagoras and Democritus say that its [the earth's] flatness is responsible for it staying still: for it does not cut the air beneath but covers it like a lid, which flat bodies evidently do: for they are hard to move even for the winds, on account of their resistance.

When a draco has eaten much fruit, it seeks the juice of the bitter lettuce; it has been seen to do this.

Neither by nature, then, nor contrary to nature do the virtues arise in us; rather we are adapted by nature to receive them, and are made perfect by habit.