Mortify therefore your members which are upon the earth; fornication, uncleanness, inordinate affection, evil desire, and covetousness, which is idolatry:
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Athanasius the Apostolic
AD 373
But the saints, and they who truly practice virtue, “mortify their members” and as the result of this, are pure and without spot, confiding in the promise of our Savior, who said, “Blessed are the pure in heart, for they shall see God.” These, having become dead to the world, who have renounced the merchandise of the world, gain an honorable death.
Thus, in movements according to the spirit, the soul sometimes opposes other movements of itself according to the flesh. Conversely, in movements according to the flesh, it opposes others which it has according to the spirit, and this is why we say the flesh lusts against the spirit and the spirit lusts against the flesh. But this is also why “it is being renewed day by day,” for the soul does not fail to make progress in virtue as it gradually diminishes the carnal desires to which it does not consent. It is to those already baptized that the apostle says, “Mortify your members, which are on the earth.” .
"Mortify therefore your members which are upon the earth; fornication, uncleanness, inordinate affection, and concupiscence, and covetousness, which is idolatry: for which things' sake cometh the wrath of God upon the children of disobedience".
And to the Gnostic false opinion is foreign, as the true belongs to him, and is allied with him. Wherefore the noble apostle calls one of the kinds of fornication, idolatry,
And again: "Mortify therefore your members which are upon the earth; putting off fornication, uncleanness, and evil concupiscence, and covetousness, which are the service of idols: for which things' sake cometh the wrath of God."
Your members. Fornication, uncleanness He considers man's body as made up of sins and sinful inclinations. (Witham)
It is not to bring back Judaism we practise abstinences and fasts, nor with the same motive as the Jews, but to accomplish the precepts of mortifying the irregular desires of the flesh among which gluttony must find a place. In a mortified body sensuality is more easily subdued. (Haydock)
In a general way all that is of the devil is characterized by hatred for God. What is of the devil is idolatry, since all idols are subject to him. Yet Paul elsewhere lays down the law in express terms, saying: “Mortify your members.” Idolatry is not confined to casting incense upon an altar with finger and thumb or to pouring libations of wine out of a cup into a bowl.
Does Paul write as though these things were in us? There is no contradiction. It is similar to one who has scoured a statue that was filthy, recast it, and displayed it new and bright, explaining that the rust was eaten off and destroyed. Yet he recommends diligence in clearing away the future rust. He does not contradict himself, for it is not that rust which he scoured off that he recommends should be cleared away but that which grew afterwards. So it is not that former putting to death he speaks of here, nor those fornications, but those which afterward grow.
I know that many are offended by the foregoing discourse, but what can I do? You heard what the Master enjoined. Am I to blame? What shall I do? Have you not seen the creditors, when debtors are obstinate, how they wear collars? Did you hear what Paul proclaimed today? Mortify, he says, your members which are upon the earth; fornication, uncleanness, passion, evil desire, and covetousness, which is idolatry. What is worse than such a covetousness? This is worse than any desire. This is still more grievous than what I was speaking of, the madness, and the silly weakness about silver. And covetousness, he says, which is idolatry. See in what the evil ends. Do not, I pray, take what I said amiss, for not by my own good-will, nor without reason, would I have enemies; but I was wishful that you should attain to such virtue, as that I might hear of you the things I ought. So that I said it not for authority's sake, nor of imperiousness, but out of pain and of sorrow. Forgive me, forgive! I h...
But God has appointed fixed limits to all of these; and if they pass these limits and begin to be too great, they must necessarily pervert their nature, and be changed into diseases and vices. And it is a matter of no great labour to show what these limits are.
He demonstrates, too, to the Colossians what "members "they are to "mortify "upon earth: "fornication, impurity, lust, evil concupiscence "and "base talk."