A city is composed of different kinds of men; similar people cannot bring a city into existence.

All that we do is done with an eye to something else.

Man is a goal-seeking animal. His life only has meaning if he is reaching out and striving for his goals.

A man is the origin of his action.

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

It is the mark of an educated mind to expect that amount of exactness which the nature of the particular subject admits. It is equally unreasonable to accept merely probable conclusions from a mathematician and to demand strict demonstration from an orator.

Nor need it cause surprise that things disagreeable to the good man should seem pleasant to some men; for mankind is liable to many corruptions and diseases, and the things in question are not really pleasant, but only pleasant to these particular persons, who are in a condition to think them so.