Musar su Proverbi 19:11

The sage has forbidden it, saying (Eccl. vii. 9), "Be not hasty in thy spirit to be angry." Furthermore the verse makes clear the reason for his forbidding it in the expression (ib.) "For anger resteth in the bosom of fools." The wrathful deserves to be called "fool." It is impossible in most cases for the man of violent wrath to be secure from grave sin and serious transgression. Thus the sage spake (Prov. xxix. 22): "A wrathful man aboundeth in transgression." Thou wilt notice that most men, when they become wroth and violently angry, take no heed of the disaster which they may incur through the violence of their anger, like him of whom it is said (id., 11), "A fool uttereth all his mind," and on the other hand (ib.). "But a wise man keepeth it till afterward." Therefore our masters, peace be upon them, sought to interdict the immoderate exercise of this quality, saying, "He who rends his garments in wrath is like unto an idolater." According to this, a superior man must not be violent in wrath, for he accustoms himself to the qualities of the wild and wicked beast. Nor must he be so gentle as never to become wrathful, for this were characteristic of little boys.¹Attributed to Aristotle in an article on "Ruhmliche Denkmale der Joiner aus den Tiirkischen," Diez (vol. i., p. 83); cf. Hatch (above cited, p. 223). The discreet stand with reference to this is to take the intermediate course. Thou must know that man's reason is perfected when it subdues his wrath. Thus Scripture says (Prov. xix. 11), "The discretion of a man deferreth his anger." Ptolemy, the sage, said of wrath, "When thou becomest wrathful, pardon, for if thou dost not yield, the taking²Versified by Steinschneider ("Manna," chap, i., p. 89); cf. Bahya, vi. 7, and Brull (p. 77, note 3). of vengeance is a sign of weakness."

And you should know that the final sum of the intelligence of a man is his ability to govern his anger. As it is said : "It is the discretion of a man to be slow to anger" (Proverbs 19:11). Anger is very close to arrogance and no angry man can escape arrogance. You already know the evils of arrogance. It is proper for a man to be distant from anger, even on a matter where anger is proper he should hold back his impulse and not be angry. A man who is subject to anger should do this right at the outset. When he resolves in his mind that he must not get angry, he must also determine and resolve that he should not feel any humiliation or any insult. Even though he be rebuked or cursed, he should not feel anything and should not concern himself about it.