That when we cannot fulfill that which the character of a man promises, we assume the character of a philosopher

It is no common thing to do this only, to fulfill the promise of a man’s nature. For what is a man? The answer is: “A rational and mortal being.” Then, by the rational faculty, from whom are we separated? From wild beasts. And from what others? From sheep and like animals. Take care then to do nothing like a wild beast; but if you do, you have lost the character of a man; you have not fulfilled your promise. See that you do nothing like a sheep; but if you do, in this case the man is lost. What then do we do as sheep? When we act gluttonously, when we act lewdly, when we act rashly, filthily, inconsiderately, to what have we declined? To sheep. What have we lost? The rational faculty. When we act contentiously and harmfully and passionately, and violently, to what have we declined? To wild beasts. Consequently some of us are great wild beasts, and others little beasts, of a bad disposition and small, whence we may say, “Let me be eaten by a lion.” But in all these ways the promise of a man acting as a man is destroyed. For when is a conjunctive proposition maintained? When it fulfills what its nature promises; so that the preservation of a complex proposition is when it is a conjunction of truths. When is a disjunctive maintained? When it fulfills what it promises. When are flutes, a lyre, a horse, a dog, preserved? What is the wonder then if man also in like manner is preserved, and in like manner is lost? Each man is improved and preserved by corresponding acts, the carpenter by acts of carpentry, the grammarian by acts of grammar. But if a man accustoms himself to write ungrammatically, of necessity his art will be corrupted and destroyed. Thus modest actions preserve the modest man, and immodest actions destroy him: and actions of fidelity preserve the faithful man, and the contrary actions destroy him. And on the other hand contrary actions strengthen contrary characters: shamelessness strengthens the shameless man, faithlessness the faithless man, abusive words the abusive man, anger the man of an angry temper, and unequal receiving and giving make the avaricious man more avaricious.

For this reason philosophers admonish us not to be satisfied with learning only, but also to add study, and then practice. For we have long been accustomed to do contrary things, and we put in practice opinions which are contrary to true o............