No attempt should be made to cure the body without the soul

That which is apprehended by intelligence and reason is always in the same state; but that which is conceived by opinion with the help of sensation and without reason, is always in a process of becoming and perishing and never really is.

Justice means minding one's own business and not meddling with other men's concerns.

To begin with the wine jar in learning the potter's art.

The human race will have no respite from evils until those who are really philosophers acquire political power or until, through some divine dispensation, those who rule and have political authority in the cities become real philosophers.

Geometry will draw the soul toward truth and create the spirit of philosophy.

And what shall he suffer who slays him who of all men, as they say, is his own best friend? I mean the suicide, who deprives himself by violence of his appointed share of life. Not because the law of the state requires him. Nor yet under the compulsion of some painful and inevitable misfortune which has come upon him. Nor because he has had to suffer from irremediable and intolerable shame, but who from sloth or want of manliness imposes upon himself an unjust penalty.