2 Corinthians 6:14

Do not err, my brethren. Those that corrupt families shall not inherit the kingdom of God. And if those that corrupt mere human families are condemned to death, how much more shall those suffer everlasting punishment who endeavour to corrupt the Church of Christ, for which the Lord Jesus, the only-begotten Son of God, endured the cross, and submitted to death! Whosoever, “being waxen fat,” and “become gross,” sets at nought His doctrine, shall go into hell. In like manner, every one that has received from God the power of distinguishing, and yet follows an unskilful shepherd, and receives a false opinion for the truth, shall be punished. …

Quoniam autem qui introducunt indifferentiam, paucas quasdam Scripturas detorquentes, titillanti suæ voluptati eas suffragari existimant; rum præcipue illam quoque: “Peccatum enim vestri non dominabitur; non estis enim sub lege, sed sub gratia;” et aliquas alias hujusmodi, quarum posthæc non est rationi consentaneum ut faciam mentionem (non enim nayera instruo piraticam), age paucis eorum argumentum perfringamus. Ipse enim egregius Apostolus in verbis, quæ prædictæ dictioni subjungit, intentati criminis afferet solutionem: “Quid ergo? peccabimus, quiâ non sumus sub lege, sed sub gratia? Absit.” Adeo divine et prophetice e vestigio dissolvit artem voluptatis sophisticam. Non intelligunt ergo, ut videtur, quod “omnes nos oportet manifestari ante tribunal Christi, ut referat unusquisque per corpus ea quæ fecit, sire bonum, sive malum:” ut quæ per corpus fecit aliquis, recipiat. …

They say, then, that Hipparchus the Pythagorean, being guilty of writing the tenets of Pythagoras in plain language, was expelled from the school, and a pillar raised for him as if he had been dead. Wherefore also in the Barbarian philosophy they call those dead who have fallen away from the dogmas, and have placed the mind in subjection to carnal passions. “For what fellowship hath righteousness and iniquity?” according to the divine apostle. “Or what communion hath light with darkness? or what concord hath Christ with Belial? or what portion hath the believer with the unbeliever?” For the honours of the Olympians and of mortals lie apart. “Wherefore also go forth from the midst of them, and be separated, saith the Lord, and touch not the unclean thing; and I will receive you, and will be to you for a Father, and ye shall be my sons and daughters.”

Our heretic must now cease to borrow poison from the Jew, “the asp,” as the adage runs, “from the viper”, and henceforth vomit forth the virulence of his own disposition, as when he alleges Christ to be a phantom. Except, indeed, that this opinion of his will be sure to have others to maintain it in his precocious and somewhat abortive Marcionites, whom the Apostle John designated as antichrists, when they denied that Christ was come in the flesh; not that they did this with the view of establishing the right of the other god (for on this point also they had been branded by the same apostle), but because they had started with assuming the incredibility of an incarnate God. …

15. But if we consider what the apostles thought about heretics, we shall find that they, in all their epistles, execrated and detested the sacrilegious wickedness of heretics. For when they say that “their word creeps as a canker,” how is such a word as that able to give remission of sins, which creeps like a canker to the ears of the hearers? And when they say that there can be no fellowship between righteousness and unrighteousness, no communion between light and darkness, how can either darkness illuminate, or unrighteousness justify? And when they say that “they are not of God, but are of the spirit of Antichrist,” how can they transact spiritual and divine matters, who are the enemies of God, and whose hearts the spirit of Antichrist has possessed? Wherefore, if, laying aside the errors of human dispute, we return with a sincere and religious faith to the evangelical authority and …

In Tobias: “Take a wife from the seed of thy parents, and take not a strange woman who is not of the tribe of thy parents.” Also in Genesis, Abraham sends his servant to take from his seed Rebecca, for his son Isaac. Also in Esdras, it was not sufficient for God when the Jews were laid waste, unless they forsook their foreign wives, with the children also whom they had begotten of them. Also in the first Epistle of Paul to the Corinthians: “The woman is bound so long as her husband liveth; but if he die, she is freed to marry whom she will, only in the Lord. But she will be happier if she abide thus.” And again: “Know ye not that your bodies are the members of Christ? Shall I take the members of Christ, and make them the members of an harlot? Far be it from me. Or know ye not that he who is joined together with an harlot is one body? for two shall be in one flesh. …

7. Wherefore, since it appears that this hypothesis of a creation from things which are not is most impious, it is necessary to say that the Father is always the Father. But He is the Father, since the Son is always with Him, on account of whom He is called the Father. Wherefore, since the Son is always with Him, the Father is always perfect, being destitute of nothing as regards good; who, not in time, nor after an interval, nor from things which are not, hath begotten His only-begotten Son. …

3. Since those about Arius speak these things and shamelessly maintain them, we, coming together with the Bishops of Egypt and the Libyas, nearly a hundred in number, have anathematized them, together with their followers. But those about Eusebius have received them, earnestly endeavouring to mix up falsehood with truth, impiety with piety. But they will not prevail; for the truth prevails, and there is no communion betwixt light and darkness, no concord between Christ and Belial. …

5. Wherefore, my brethren who fear God, remember what the Apostle Peter says: Your adversary, the devil, as a roaring lion, walketh about, seeking whom he may devour.” When he cannot devour a man through seducing him into iniquity, he attempts to injure his good name, that if it be possible, he may give way under the reproaches of men and the calumnies of slandering tongues, and may thus fall into his jaws. If, however, he be unable even to sully the good name of one who is innocent, he tries to persuade him to cherish unkindly suspicions of his brother, and judge him harshly, and so become entangled, and be an easy prey. …

17. Why this should be done by Him who “before we ask Him knoweth what things we have need of,” might perplex our minds, if we did not understand that the Lord our God requires us to ask not that thereby our wish may be intimated to Him, for to Him it cannot be unknown, but in order that by prayer there may be exercised in us by supplications that desire by which we may receive what He prepares to bestow. His gifts are very great, but we are small and straitened in our capacity of receiving. Wherefore it is said to us: “Be ye enlarged, not bearing the yoke along with unbelievers. …

As to the words following, “And if any have not worshipped the beast nor his image, nor have received his inscription on their forehead, or on their hand,” we must take them of both the living and the dead. And what this beast is, though it requires a more careful investigation, yet it is not inconsistent with the true faith to understand it of the ungodly city itself, and the community of unbelievers set in opposition to the faithful people and the city of God. “His image” seems to me to mean his simulation, to wit, in those men who profess to believe, but live as unbelievers. For they pretend to be what they are not, and are called Christians, not from a true likeness but from a deceitful image. …

Chapter 13. 20. There is therefore "no fellowship between righteousness and unrighteousness," not only without, but also within the Church; for "the Lord knoweth them that are His," and "Let every one that nameth the name of Christ depart from iniquity." There is also "no communion between light and darkness," not only without, but also within the Church; for "he that hateth his brother is still in darkness." And they at any rate hated Paul, who, preaching Christ of envy and malicious strife, supposed that they added affliction to his bonds; and yet the same Cyprian understands these still to have been within the Church. …