The happy man . . . will be always or at least most often employed in doing and contemplating the things that are in conformity with virtue. And he will bear changes of fortunes most nobly, and with perfect propriety in every way.

To know what virtue is is not enough; we must endeavor to possess and to practice it, or in some other manner actually ourselves to become good.

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

For the real difference between humans and other animals is that humans alone have perception of good and evil, just and unjust, etc. It is the sharing of a common view in these matters that makes a household and a state.

The soul is characterized by these capacities; self-nutrition, sensation, thinking, and movement.

All art is concerned with coming into being; for it is concerned neither with things that are, or come into being by necessity, nor with things that do so in accordance with nature.

The greatest of all pleasures is the pleasure of learning.