Rev 2:6

“The Nicolaitanes are the followers of that Nicolas who was one of the seven first ordained to the diaconate by the apostles. They lead lives of unrestrained indulgence. The character of these men is very plainly pointed out in the Apocalypse of John, [when they are represented] as teaching that it is a matter of indifference to practise adultery, and to eat things sacrificed to idols. Wherefore the Word has also spoken of them thus: "But this thou hast, that thou hatest the deeds of the Nicolaitanes, which I also hate."”

“Similar, too, are those who claim to be followers of Nicolaus. They keep one of the man's sayings, forcing its meaning: "One must misuse the flesh." But this admirable man showed that we ought to curtail pleasures and desires and to use this discipline to weaken the impulses and onset of the flesh. Those who wallow in pleasure like goats are (you might say) violating the body and are plunged in the delights of passion. They do not realize that the body, whose nature is fleeting, falls into rags, while the soul is buried in a slough of vice, when they follow the instructions of pleasure rather than a man of apostolic faith.”

“A brother heretic emerged in Nicolaus. He was one of the seven deacons who were appointed in the Acts of the Apostles. He affirms that Darkness was seized with a concupiscence—and, indeed, a foul and obscene one—after Light: out of this permixture it is a shame to say what fetid and unclean (combinations arose). The rest (of his tenets), too, are obscene. For he tells of certain Æons, sons of turpitude, and of conjunctions of execrable and obscene embraces and permixtures, and certain yet baser outcomes of these. He teaches that there were born, moreover, dæmons, and gods, and spirits seven, and other things sufficiently sacrilegious alike and foul, which we blush to recount, and at once pass them by. Enough it is for us that this heresy of the Nicolaitans has been condemned by the Apocalypse of the Lord with the weightiest authority attaching to a sentence, in saying "Because this thou holdest, thou hatest the doctrine of the Nicolaitans, which I too hate."”

“There are, however, among the Gnostics diversities of opinion; but we have decided that it would not be worth while to enumerate the silly doctrines of these (heretics), inasmuch as they are (too) numerous and devoid of reason, and full of blasphemy. Now, even those (of the heretics) who are of a more serious turn in regard of the Divinity, and have derived their systems of speculation from the Greeks, must stand convicted (of these charges). But Nicolaus has been a cause of the wide-spread combination of these wicked men. He, as one of the seven (that were chosen) for the diaconate, was appointed by the Apostles. (But Nicolaus) departed from correct doctrine, and was in the habit of inculcating indifferency of both life and food. And when the disciples (of Nicolaus) continued to offer insult to the Holy Spirit, John reproved them in the Apocalypse as fornicators and eaters of things offered unto idols.”

“"This thou hast also, that thou hatest the deeds of the Nicolaitanes." But because thou thyself hatest those who hold the doctrines of the Nicolaitanes, thou expectest praise. Moreover, to hate the works of the Nicolaitanes, which He Himself also hated, this tends to praise. But the works of the Nicolaitanes were in that time false and troublesome men, who, as ministers under the name of Nicolaus, had made for themselves a heresy, to the effect that what had been offered to idols might be exorcised and eaten, and that whoever should have committed fornication might receive peace on the eighth day. Therefore He extols those to whom He is writing; and to these men, being such and so great, He promised the tree of life, which is in the paradise of His God.”

“But this thou hast, that thou hatest the deeds of the Nicolaites, which I also hate. As if the universal angel were told, "Not in the species that I have just frightened, but in another one, thou hast this, that thou hatest the deeds of the Nicolaites, which I also hate." As for what the specific deeds of the Nicolaites are, blessed Augustine explained it in his book on heresies, saying: "Nicolas, according to the story, was one of the seven deacons who were ordained by the apostles. [Cf. Acts 6] As he was censured for jealousy towards his wife, who was very beautiful, he is said, in order to exculpate himself, to have given permission for anyone who so wished to use her. This deed of his gave rise to a most shameful sect, which has as a principle the promiscuous use of women. Its followers also do not even keep their food free of things sacrificed to idols." Moreover, all the heretics generally, are Nicolaites: indeed "Nicolas" translates to "foolish people." Therefore all those who do not hold the right views concerning the Father's wisdom, which is the Son, even if they are wise for the world, show that they are fools for God. We find Nicolaites even in the Church: namely those we see foolishly amassing treasure in their love for the world. Finally, it is to be noted that he does not say "Thou hatest the Nicolaites," but the deeds of the Nicolaites, because it is demonstrated that the Lord and those who are on his side do not hate in them the nature, which was created good in them, but their execrable deeds.”

“Of the Nicolaitans, it is interpreted as "a pouring out" or "the folly of a fainting church." And this is rightly said of heretics who have been poured out from the container of the truth and have tumbled headlong into the mud of deceit. And, concerning this pouring out, it is said in the Law: "You are poured out as water; you will not rise up." Clearly, the foolishness of a fainting church is the perverse teaching of the heretics, for they do not bring healing to the wound of the people, but they afflict upon the people the greatest of weaknesses, thinking foolish thoughts about God and being themselves fully taken over by ridiculous ideas. Concerning such persons it is said: "They have restored the sorrow of my people to dishonor, saying, 'Peace, peace,' when there is no peace."”

“He says, nevertheless, you have this in your favor, that you hate the works of the Nicolaitans, which I also hate. He placed the fault of the two achievements in the middle, so that from the praises at the extremes, he might console the blame in the middle, so that no one would be overwhelmed by the greater sorrow. Now, as for Nicolaus, the one for whom we are speaking, he became an arch-heretic, blasphemous and detestable. Therefore, those descended from him, turning away from those evils, found praise in Ephesus through Christ. ...”