What has soul in it differs from what has not, in that the former displays life. Now this word has more than one sense, and provided any one alone of these is found in a thing we say that thing is living. Living, that is, may mean thinking or perception or local movement and rest, or movement in the sense of nutrition, decay and growth. Hence we think of plants also as living, for they are observed to possess in themselves an originative power through which they increase or decrease in all spatial directions.

Aristotle said: "Evil brings men together."

Some vices miss what is right because they are deficient, others because they are excessive, in feelings or in actions, while virtue finds and chooses the mean.

Happiness is a state of activity.

There is a foolish corner in the brain of the wisest man.

The pleasures arising from thinking and learning will make us think and learn all the more. 1153a 23

A change in the shape of the body creates a change in the state of the soul.