"The wise are instructed by reason, average minds by experience, the stupid by necessity and the brut..." — Marcus Tullius Cicero

Never go to excess, but let moderation be your guide.

If you pursue good with labor, the labor passes away but the good remains; if you pursue evil with pleasure, the pleasure passes away and the evil remains.

Never injure a friend, even in jest.

A friend is, as it were, a second self.