To Demonicus (49-50)

and rightly, too, for when we condemn those who deceive us in words alone, how, pray, can we deny the baseness of those who in their whole lives belie their promise?[*] We should be right in judging that such men not only sin against themselves, but are traitors to fortune as well; for fortune places in their hands wealth and reputation and friends, but they, for their part, make themselves unworthy of the blessings which lie within their grasp.

And if a mortal may make conjecture of the thoughts of the gods, I think that they also have revealed very clearly in their treatment of their nearest kin how they are disposed to the good and base among men. For Zeus, who, as the myths relate and all men believe, was the father of Heracles and Tantalus, made the one immortal because of his virtue, and inflicted on the other the severest punishments because of his evil character.