1 Samuel 15:6

And Saul said to the Kenite, "Go, depart, etc." The holy history reports that the Kenites were the relatives of Moses, saying: "Now Heber the Kenite had separated from the rest of the Kenites, the sons of Hobab the kinsman of Moses; and had pitched his tent as far as the valley which is called Sennim, and he was near Kedesh" (Judges IV). Therefore, Saul commanded the Kenite to withdraw from Amalek. An excellent teacher takes care that if he finds anything among the vices which he reproves, that he may embrace virtues found among them, keeping them unharmed. For you will find many even among pagans who are meek, humble, kind, patient, and serving with almsgiving and prayers in the example of the centurion Cornelius. Surely, these virtues, because they are close to the law of God as if by kinship, emerging from the depths of the worldly darkness, help to reach the promised rest and light, and should not be destroyed among the vices but separated from the catalog of all vices, so that they may benefit their possessor. For a Kenite, which means "possessor," should be separated from all vices. Thus, at Saul's command, the Kenite, who is to be saved, departs from the perishing Amalek when the rigorous teacher separates the virtues that help from the vices that weigh down in the examination of those to be instructed; so that the virtues, which are diligently practiced among the reprovable vices, may not be detested because of someone's bad vices. Nor, on the other hand, should someone's vices, which, as humans, cannot be free from among the virtues, be judged to be embraced because of their proximity to virtues; but with fair judgment, let the crooked be corrected in all things, which impede the way of salvation, and let the right be preserved, which help.

Who is the Kenite, who is known to dwell with Amalek, and who is compelled to depart, lest he be equally entangled with him? But perhaps this is the one about whom the Apostle says: "Let the husband render to his wife what is due, and likewise the wife to her husband" (1 Cor. 7:3). The name also fits him, because "Kenite" is said to mean "possessing." These married persons, because they are bound by marriage, are not compelled to abandon everything. What then does it mean when it is said to the Kenite, "Depart from Amalek," unless that by these words all the foulness of obscenity among married persons is condemned? Indeed, those who are joined in the manner of harlots are united with Amalek. The teacher commands them to depart from Amalek when he strives to recall them to marital decency. As if to say: If you cannot contain yourselves from one another, let marriage be honorable for you, and the bed undefiled. Therefore, to depart from Amalek is for spouses to use one another not for the foulness of harlot-like obscenity, but for the temperance of decency and for the fruit of offspring. Hence the same excellent teacher says of the widow who cannot remain so according to his counsel: "But if she cannot contain herself, let her marry, only in the Lord" (ibid., 9). Not in Amalek, but in the Lord; so that she who cannot prevail to abstain from marriage may avoid obscene acts within the covenant of marriage. He also threatens, saying: "Lest I entangle you with him." To be entangled with sinners is to be condemned to eternal punishment. Hence the Lord also says of the wicked servant in the Gospel: "Bind his feet and hands, and cast him into outer darkness" (Matt. 22:13). Now therefore, preachers do not entangle reprobate hearers, because even if they despise the word, they can still return to repentance as long as they live, when they wish. Therefore, marital decency must be urgently commanded to married persons, because with a stern penalty it is said: "Go, depart without harm. Depart from Amalek, lest I entangle you with him." Without harm indeed one departs now, but not then, because those who are made entirely like the foul will not be free from their harm. He is also said to have shown mercy to the children of Israel when they were ascending from Egypt, because the weak children of holy Church, since they cannot preserve the good of perpetual continence, are…