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

There is a cropping-time in the races of men, as in the fruits of the field; and sometimes, if the stock be good, there springs up for a time a succession of splendid men; and then comes a period of barrenness.

To be ignorant of motion is to be ignorant of nature

In the first place, then, men should guard against the beginning of change, and in the second place they should not rely upon the political devices of which I have already spoken invented only to deceive the people, for they are proved by experience to be useless.

Teaching is the highest form of understanding.

The wise man knows of all things, as far as possible, although he has no knowledge of each of them in detail

There are some jobs in which it is impossible for a man to be virtuous.