The only way to achieve true success is to express yourself completely in service to society.

Since we think we understand when we know the explanation, and there are four types of explanation (one, what it is to be a thing; one, that if certain things hold it is necessary that this does; another, what initiated the change; and fourth, the aim), all these are proved through the middle term.

All friendly feelings toward others come from the friendly feelings a person has for himself.

Personal beauty requires that one should be tall; little people may have charm and elegance, but beauty-no.

Through discipline comes freedom.

The laws are, and ought to be, relative to the constitution, and not the constitution to the laws. A constitution is the organization of offices in a state, and determines what is to be the governing body, and what is the end of each community. But laws are not to be confounded with the principles of the constitution; they are the rules according to which the magistrates should administer the state, and proceed against offenders.

A constitution is the arrangement of magistracies in a state.