2 Corinthians 11:15

7. Wherefore, since the Apostle Paul says in another place, that even Satan transforms himself into an angel of light, and that therefore it is not strange that his servants should assume the guise of ministers of righteousness: if your correspondent did indeed see an angel teaching him error, and desiring to separate Christians from the Catholic unity, he has met with an angel of Satan transforming himself into an angel of light. If, however, he has lied to you, and has seen no such vision, he is himself a servant of Satan, assuming the guise of a minister of righteousness. And yet, if he be not incorrigibly obstinate and perverse, he may, by considering all the things now stated, be delivered both from misleading others, and from being himself misled. …

Chapter 18. 40. Petilianus said: "Nor is it, after all, so strange that you assume to yourself the name of bishop without authority. This is the true custom of the devil, to choose in preference a mode of deceiving by which he usurps to himself a word of holy meaning, as the apostle declares to us: ‘And no marvel,’ he says: ‘for Satan himself is transformed into an angel of light. Therefore it is no great thing if his ministers also be transformed as the ministers of righteousness.’ Nor is it therefore a marvel if you falsely call yourself a bishop. …

Some say that here the priests are hinted at, but away with this. His speech is about demons. For had he been speaking about corrupt priests, he would have meant them above when he said, “the world is judged in you:” (for the Scripture is wont to call evil men also “The world:”) and he would not have said the same thing twice, nor would he, as if he was saying something of greater consequence, have put it down afterwards. But he speaks concerning those angels about whom Christ saith, “Depart ye into the fire which is prepared for the devil and his angels.” (St. Matt. xxv. 41 .) And Paul, “his angels fashion themselves as ministers of righteousness.” ( 2 Cor. xi. 15 .) For when the very incorporeal powers shall be found inferior to us who are clothed with flesh, they shall suffer heavier punishment.

Now that he said these things of these factions relating to the tables, and that contention and division, he made manifest also from what follows. For having said, “I hear that there are divisions among you,” he stopped not here, but signifying what divisions he means he goes on to say, “each one taketh before other his own supper;” and again, “What? have ye not houses to eat and to drink in? or despise ye the Church of God?” However, that of these he was speaking is evident. And if he call them divisions, marvel not. For, as I said, he wishes to touch them by the expression: whereas had they been divisions of doctrine, he would not have discoursed with them thus mildly. …

Ver. 14, 15 . “And no marvel; for if even Satan fashioneth himself into an angel of light, is it a great thing if his ministers also fashion themselves as ministers of righteousness?” So that if one ought to marvel, this is what he ought to marvel at, and not at their transformation. For when their teacher dares do any thing, no marvel that the disciples also follow. But what is “an angel of light?” That hath free liberty to speak, that standeth near to God. For there are also angels of darkness; those which be the devil’s, those dark and cruel ones. And the devil hath deceived many so, fashioning himself “into,” not becoming, “an angel of light.” So do also do these bear about them the form of an Apostle, not the power itself, for this they cannot. But nothing is so like the devil as to do things for display. …

Moral . If then it is a warfare, if such are the forces arrayed against us, if “the principalities” are incorporeal, if they are “rulers of the world,” if they are “the spiritual hosts of wickedness,” how, tell me, canst thou live in self-indulgence? How canst thou be dissolute? How if we are unarmed, shall we be able to overcome? These words let every one repeat to himself every day, whenever he is under the influence of anger, or of lust, whenever he is aiming, and all to no profit, after this languid life. Let him hearken to the blessed Paul, saying to him, “Our wrestling is not against flesh and blood, but against the principalities, against the powers.” A harder warfare this than that which is matter of sense, a fiercer conflict. Think how long time this enemy is wrestling, for what it is that he is fighting, and be more guarded than ever. …

11. Once more the fire of unchastity seized you, this time among savage swords and in the quarters of a married barbarian of great influence and power. You were not afraid to commit adultery in a house where the injured husband might have punished you without calling in a judge’s aid. You found yourself attracted and drawn to suburban parks and gardens; and, in the husband’s absence behaved as boldly and madly as if you supposed your companion to be not your paramour but your wife. She was at last captured, but you escaped through an underground passage and secretly made your way to Rome. There you hid yourself among some Samnite robbers; and on the first hint that the aggrieved husband was coming down from the Alps like a new Hannibal in search of you, you did not think yourself safe till you had taken refuge on shipboard. …

17. Therefore, my beloved, when the Holy Spirit departs from a man who has received it, until it returns and comes to him, then Satan draws near unto that man, to cause him to sin, and that the Holy Spirit may leave him altogether. For as long as the Spirit is with a man, Satan fears to come near him. And observe, my beloved, that our Lord also, Who was born from the Spirit, was not tempted by Satan until in baptism He received the Spirit from on high. And then the Spirit led him forth to be tempted by Satan. This, then, is the way with man; that in the hour in which he perceives in himself that he is not fervent in the Spirit, and that his heart is inclining to the thought of this world, he may know that the Spirit is not with him, and may arise and pray and keep vigil that the Spirit of God may come to him, that he be not overcome by the adversary. …