Nature does nothing uselessly. — Aristotle

It is not easy to determine the nature of music, or why any one should have a knowledge of it.

Law is order, and good law is good order.

Happiness, whether consisting in pleasure or virtue, or both, is more often found with those who are highly cultivated in their minds and in their character, and have only a moderate share of external goods, than among those who possess external goods to a useless extent but are deficient in higher qualities.