Augustine of Hippo : These illusions are apparitions of that spirit who seeks to ensnare unhappy souls in the deceptive rites of a multitude of false gods and to turn them aside from the true worship of the true God, by whom alone they can be purified and healed. — City of God 10.10 Augustine of Hippo : For so great is the influence of probity and chastity, that all men, or almost all men, are moved by the praise of these virtues; nor is any man so depraved by vice, but he hath some feeling of honor left in him. So that, unless the devil sometimes transformed himself, as Scripture says, into an angel of light, he could not compass his deceitful purpose. Accordingly, in public, a bold impurity fills the ear of the people with noisy clamor; in private, a feigned chastity speaks in scarce audible whispers to a few: an open stage is provided for shameful things, but on the praiseworthy the curtain falls: grace hides, disgrace flaunts: a wicked deed draws an overflowing house, a virtuous speech finds scarce a hearer, as though purity were to be blushed at, impurity boasted of. Where else can such confusion reign, but in devils' temples? Where, but in the haunts of deceit? — City of God 2.26 Augustine of Hippo : Satan sometimes transforms himself into an angel of light in order to test those who need testing or to deceive those who deserve deception. Nothing but the great mercy of God can save a man from mistaking bad demons for good angels and false friends for true ones and from suffering the full damages of this diabolical deception which is all the more deadly in that it is wily beyond words. — City of God 19.9 Augustine of Hippo : As for the power of darkness, what is it but the power of the devil and his angels, who, after being angels of light, did not use their free will to stand in the truth but by falling from it became darkness? I am not teaching you this; I am advising you to call to mind what you know. So, the human race became subject to this power of darkness by the fall of the first man who was induced by that power to commit sin, and in him we have all fallen. — LETTER 217, TO VITALIS Clement of Alexandria : Further, let those who say that philosophy took its rise from the devil know this, that the Scripture says that "the devil is transformed into an angel of light." When about to do what? Plainly, when about to prophesy. But if he prophesies as an angel of light, he will speak what is true. And if he prophesies what is angelical, and of the light, then he prophesies what is beneficial when he is transformed according to the likeness of the operation, though he be different with respect to the matter of apostasy. For how could he deceive any one, without drawing the lover of knowledge into fellowship, and so drawing him afterwards into falsehood? Especially he will be found to know the truth, if not so as to comprehend it, yet so as not to be unacquainted with it. Philosophy is not then false, though the thief and the liar speak truth, through a transformation of operation. Nor is sentence of condemnation to be pronounced ignorantly against what is said, on account of him who says it (which also is to be kept in view, in the case of those who are now alleged to prophesy); but what is said must be looked at, to see if it keep by the truth. — The Stromata Book 6 Cyprian : He invented heresies and schisms to undermine faith, pervert truth and break unity. Unable to keep us in the dark ways of former error, he draws us into a new maze of deceit. He snatches men away from the church itself and, just when they think they have drawn near to the light and escaped the night of the world, he plunges them unawares into a new darkness. Though they do not stand by the gospel and discipline and law of Christ, they call themselves Christians. Though they are walking in darkness, they think they are in the light, through the deceitful flattery of the adversary who, as the apostle said, transforms himself into an angel of light and adorns his ministers as ministers of righteousness. They call night day, death salvation, despair hope, perfidy faith, antichrist Christ, cunningly to frustrate truth by their lying show of truth. That is what happens, my brothers, when we do not return to the fount of truth, when we are not looking to the head and keeping the doctrine taught from heaven. — Treatise I. On the Unity of the Church 3 Cyril of Jerusalem : Evil apes respectability, and tares do their best to look like wheat, but however close a similarity to wheat they have in appearance their taste completely undeceives the discerning. Even the devil "transforms himself into an angel of light," not meaning to ascend again to his former place (for he possesses a heart as hard as an anvil and has no intention of repenting ever) but to snare those who are living the angelic life in blinding darkness and infest them with a condition of faithlessness. There are many wolves going about "in sheep's clothing," but though they wear the coats of sheep, they possess nonetheless both talons and teeth. They wrap themselves in the gentle creature's hide and with this disguise deceive the innocent only to inject with their teeth the deadly poison of their irreligion. We therefore need the grace of God, a sober mind and watchful eyes, so as not to eat tares for wheat and come to harm for not knowing better; so as not to mistake the wolf for a sheep and be ravaged; and so as not to take the death-dealing devil for a good angel and be devoured. — Catechetical Lecture 4:1 John Chrysostom : "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. But what is "a ministry of righteousness?" That which we are who preach to you a Gospel having righteousness. For he either means this, or else that they invest themselves with the character of righteous men. How then shall we know them? "By their works," as Christ said. Wherefore he is compelled to place his own good deeds and their wickedness side by side, that the spurious may become evident by the comparison. — Homily 24 on 2 Corinthians Methodius of Olympus : And hence he wishes to seem a fig-tree or vine, and to produce sweetness and joy, and is "transformed into an angel of light" — Methodius Discourse X. Domnina Pseudo-Clement : To this Aquila answered: "How, then, are men in fault, if the wicked one, transforming himself into the brightness of light, [2 Corinthians 11:14] promises to men greater things than the Creator Himself does?" Then Peter answered: "I think," says he "that nothing is more unjust than this; and now listen while I tell you how unjust it is. If your son, whom you have trained and nourished with all care, and brought to man's estate, should be ungrateful to you, and should leave you and go to another, whom perhaps he may have seen to be richer, and should show to him the honour which he owed to you, and, through hope of greater profit, should deny his birth, and refuse you your paternal rights, would this seem to you right or wicked?" Then Aquila answered: "It is manifest to all that it would be wicked." Then Peter said: "If you say that this would be wicked among men, how much more so is it in the case of God, who, above all men, is worthy of honour from men; whose benefits we not only enjoy, but by whose means and power it is that we began to be when we were not, and whom, if we please, we shall obtain from Him to be for ever in blessedness! In order, therefore, that the unfaithful may be distinguished from the faithful, and the pious from the impious, it has been permitted to the wicked one to use those arts by which the affections of every one towards the true Father may be proved. But if there were in truth some strange God, were it right to leave our own God, who created us, and who is our Father and our Maker, and to pass over to another?" "God forbid." said Aquila. Then said Peter: "How, then, shall we say that the wicked one is the cause of our sin, when this is done by permission of God, that those may be proved and condemned in the day of judgment, who, allured by greater promises, have abandoned their duty towards their true Father and Creator; while those who have kept the faith and the love of their own Father, even with poverty, if so it has befallen, and with tribulation, may enjoy heavenly gifts and immortal dignities in His kingdom. But we shall expound these things more carefully at another time. Meantime I desire to know what Simon did after this." — Recognitions (Book II) Tertullian : Demanding then a law of God, you have that common one prevailing all over the world, engraven on the natural tables to which the apostle too is wont to appeal, as when in respect. of the woman's veil he says, "Does not even Nature teach you? " -as when to the Romans, affirming that the heathen do by nature those things which the law requires, he suggests both natural law and a law-revealing nature. — De Corona Tertullian : But, to come now to Moses, why, I wonder, did he merely at the time when Joshua was battling against Amalek, pray sitting with hands expanded, when, in circumstances so critical, he ought rather, surely, to have commended his prayer by knees bended, and hands beating his breast, and a face prostrate on the ground; except it was that there, where the name of the Lord Jesus was the theme of speech-destined as He was to enter the lists one day singly against the devil-the figure of the cross was also necessary, (that figure) through which Jesus was to win the victory? Why, again, did the same Moses, after the prohibition of any "likeness of anything," set forth a brazen serpent, placed on a "tree," in a hanging posture, for a spectacle of healing to Israel, at the time when, after their idolatry, they were suffering extermination by serpents, except that in this case he was exhibiting the Lord's cross on which the "serpent" the devil was "made a show of," and, for every one hurt by such snakes-that is, his angels -on turning intently from the peccancy of sins to the sacraments of Christ's cross, salvation was outwrought? For he who then gazed upon that (cross) was freed from the bite of the serpents. — An Answer to the Jews Tertullian : God forbid, however, that we should suppose that the soul of any saint, much less of a prophet, can be dragged out of (its resting-place in Hades) by a demon. We know that "Satan himself is transformed into an angel of light" -much more into a man of light-and that at last he will "show himself to be even God," and will exhibit "great signs and wonders, insomuch that, if it were possible, he shall deceive the very elect. — A Treatise on the Soul Tertullian : The Holy Ghost had even then foreseen that there would be in a certain virgin (called) Philumene an angel of deceit, "transformed into an angel of light," by whose miracles and illusions Apelles was led (when) he introduced his new heresy. — The Prescription Against Heretics Tertullian : If "Satan himself, too, is transformed into an angel of light," such an assertion must not be used to the prejudice of the Creator. — Against Marcion Book V Tertullian : But if you maintain that a transfiguration and a conversion amounts to the annihilation of any substance, then it follows that "Saul, when changed into another man," passed away from his own bodily substance; and that Satan himself, when "transformed into an angel of light," loses his own proper character. — On the Resurrection of the Flesh