False words are not only evil in themselves, but they infect the soul with evil.

Do not train children to learning by force and harshness, but direct them to it by what amuses their minds.

Those who have a natural talent for calculation are generally quick-witted at every other kind of knowledge; and even the dull, if they have had an arithmetical training, although they may derive no other advantage from it, always become much quicker than they would have been.

To be curious about that which is not one's concern while still in ignorance of oneself is ridiculous.

Justice in the life and conduct of the State is possible only as first it resides in the hearts and souls of the citizens.

The affairs of music ought, somehow, to terminate in the love of the beautiful.

You ought not to heal the body without the soul, for this is the great error of our day in treating the human body.