O sleepers! what a thing is slumber! Sleep resembles death. Ah, why then dost thou not work in such wise as that after death thou mayst retain a resemblance to perfect life, when, during life, thou art in sleep so like to the hapless dead?

The study of what is excellent is food for the mind and body.

Necessity is a guardian in Nature.

The organ of perception acts more readily than judgment.

Nothing can be loved or hated unless it is first known.

The desire to know is natural to good men.

Inequality is the cause of all local movements.