The heart is the perfection of the whole organism. Therefore the principles of the power of perception and the souls ability to nourish itself must lie in the heart.

Aristotle said: "Evil brings men together."

Why is it that all those who have become eminent in philosophy, politics, poetry, or the arts are clearly of an atrabilious temperament and some of them to such an extent as to be affected by diseases caused by black bile?

We make war that we may live in peace.

It is easy to perform a good action, but not easy to acquire a settled habit of performing such actions.

Bad people...are in conflict with themselves; they desire one thing and will another, like the incontinent who choose harmful pleasures instead of what they themselves believe to be good.

The greatest injustices proceed from those who pursue excess, not by those who are driven by necessity.