The Treatises of Cyprian: Three Books of Testimonies Against the Jews. 67That anger must be overcome, lest it constrain us to sin.

8. That anger must be overcome, lest it constrain us to sin.

In Solomon in the Proverbs: "Better is a patient man than a strong man; for he who restrains his anger is better than he who taketh a city." Also in the same place: "The imprudent man declareth his anger on the same day, but the crafty man hideth away his dishonour." Of this same thing to the Ephesians: "Be ye angry, and sin not. Let not the sun set upon your wrath." Also in the Gospel according to Matthew: "Ye have heard that it was said by the ancients, Thou shalt not kill; and whoever shall kill shall be guilty of the judgment. But I say unto you, That every one who is angry with his brother without cause shall be guilty of the judgment."