1 John 3:9

Ver. 9 . He says, “Whosoever is born of God does not commit sin, for His seed remaineth in him;” that is, His word in him who is born again through faith.

From the Epistle also of John they forthwith cull (a proof). It is said: “The blood of His Son purifieth us utterly from every sin.” Always then, and in every form, we will sin, if always and from every sin He utterly purifies us; or else, if not always , not again after believing; and if not from sin, not again from fornication. But what is the point whence (John) has started? He had predicated “God” to be “Light,” and that “darkness is not in Him,” and that “we lie if we say that we have communion with Him, and walk in darkness.” “If, however,” he says, “we walk in the light, we shall have communion with Him, and the blood of Jesus Christ our Lord purifieth us utterly from every sin.” Walking, then, in the light, do we sin? and, sinning in the light, shall we be utterly purified? By no means. For he who sins is not in the light, but in darkness. …

But in what way shall the good go out to see the punishment of the wicked? Are they to leave their happy abodes by a bodily movement, and proceed to the places of punishment, so as to witness the torments of the wicked in their bodily presence? Certainly not; but they shall go out by knowledge. For this expression, go out , signifies that those who shall be punished shall be without. And thus the Lord also calls these places “the outer darkness,” to which is opposed that entrance concerning which it is said to the good servant, “Enter into the joy of thy Lord,” that it may not be supposed that the wicked can enter thither and be known, but rather that the good by their knowledge go out to them, because the good are to know that which is without. …

40. But sometimes a peril to eternal salvation itself is put forth against us; which peril, they cry out, we by telling a lie, if otherwise it cannot be, must ward off. As, for instance, if a person who is to be baptized be in the power of impious and infidel men, and cannot be got at that he may be washed with the laver of regeneration, but by deceiving his keepers with a lie. From this most invidious cry, by which we are compelled, not for a man’s wealth or honors in this world which are fleeting by, not for the life itself of this present time, but for the eternal salvation of a human being, to tell a lie, whither shall I betake me for refuge but unto thee, O truth? And by thee is put forth before me, Chastity. …

40. Accordingly, He so now cleanses His Church by the washing of water in the word, that He may hereafter show it to Himself as not having spot, or wrinkle, or any such thing, altogether beautiful, that is to say, and in absolute perfection, when death shall be "swallowed up in victory." Now, therefore, in so far as the life is flourishing within us that proceeds from our being born of God, living by faith, so far we are righteous; but in so far as we drag along with us the traces of our mortal nature as derived from Adam, so far we cannot be free from sin. …

And hence in the passage, “Whosoever is born of God doth not sin, and he cannot sin, for His seed remaineth in him,” and in every other passage of like import, they much deceive themselves by an inadequate consideration of the Scriptures. For they fail to observe that men severally become sons of God when they begin to live in newness of spirit, and to be renewed as to the inner man after the image of Him that created them. For it is not from the moment of a man’s baptism that all his old infirmity is destroyed, but renovation begins with the remission of all his sins, and so far as he who is now wise is spiritually wise. All things else, however, are accomplished in hope, looking forward to their being also realized in fact, even to the renewal of the body itself in that better state of immortality and incorruption with which we shall be clothed at the resurrection of the dead. …

Our full adoption, then, as children, is to happen at the redemption of our body. It is therefore the first-fruits of the Spirit which we now possess, whence we are already really become the children of God; for the rest, indeed, as it is by hope that we are saved and renewed, so are we the children of God. But inasmuch as we are not yet actually saved, we are also not yet fully renewed, nor yet also fully sons of God, but children of the world. We are therefore advancing in renewal and holiness of life, and it is by this that we are children of God, and by this also we cannot commit sin; until at last the whole of that by which we are kept as yet children of this world is changed into this; for it is owing to this that we are as yet able to sin. …

The statement, therefore, “He that is born of God sinneth not,” is not contrary to the passage in which it is declared by those who are born of God, “If we say that we have no sin, we deceive ourselves, and the truth is not in us.” For however complete may be a man’s present hope, and however real may be his renewal by spiritual regeneration in that part of his nature, he still, for all that, carries about a body which is corrupt, and which presses down his soul; and so long as this is the case, one must distinguish even in the same individual the relation and source of each several action. Now, I suppose it is not easy to find in God’s Scripture so weighty a testimony of holiness given of any man as that which is written of His three servants, Noah, Daniel, and Job, whom the Prophet Ezekiel describes as the only men able to be delivered from God’s impending wrath. …

That, too, which is said to him, “that it is nowhere written in so many words, A man can be without sin,” he easily refutes thus: “That the question here is not in what precise words each doctrinal statement is made.” It is perhaps not without reason that, while in several passages of Scripture we may find it said that men are without excuse, it is nowhere found that any man is described as being without sin, except Him only, of whom it is plainly said, that “He knew no sin.” Similarly, we read in the passage where the subject is concerning priests: “He was in all points tempted like as we are, only without sin,”, meaning, of course, in that flesh which bore the likeness of sinful flesh, although it was not sinful flesh; a likeness, indeed, which it would not have borne if it had not been in every other respect the same as sinful flesh. …

“They also quote,” says he, “this passage, “If we say that we have no sin, we deceive ourselves, and the truth is not in us.” And this very clear testimony he has endeavoured to meet with apparently contradictory texts, saying thus: “The same St. John in this very epistle says, ‘This, however, brethren, I say, that ye sin not. Whosoever is born of God doth not commit sin; for his seed remaineth in him: and he cannot sin.’ Also elsewhere: ‘Whosoever is born of God sinneth not; because his being born of God preserveth him, and the evil one toucheth him not.’ And again in another passage, when speaking of the Saviour, he says: ‘Since He was manifested to take away sins, whosoever abideth in Him sinneth not: whosoever sinneth hath not seen Him, neither known Him.’ And yet again: ‘Beloved, now are we the sons of God; and it doth not yet appear what we shall be: but we know that, when He shall …

That love, however, which is a virtue, comes to us from God, not from ourselves, according to the testimony of Scripture, which says: “Love is of God; and every one that loveth is born of God, and knoweth God: for God is love.” It is on the principle of this love that one can best understand the passage, “Whosoever is born of God doth not commit sin;” as well as the sentence, “And he cannot sin.” Because the love according to which we are born of God “doth not behave itself unseemly,” and “thinketh no evil.” Therefore, whenever a man sins, it is not according to love: but it is according to cupidity that he commits sin; and following such a disposition, he is not born of God. Because, as it has been already stated, “the capacity” of which we speak is capable of either root. …

“They assert,” say they, “that baptism, moreover, does not make men new, that is, does not give complete remission of sins; but they contend that they are partly made children of God and partly remain children of the world, that is, of the devil.” They deceive; they lay traps; they shuffle; we do not say this. For we say that all men who are children of the devil are also children of the world; but not that all children of the world are also children of the devil. Far be it from us to say that the holy fathers Abraham, Isaac, and Jacob, and others of this kind, were children of the devil when they were begetting in marriage, and those believers who until now and still hereafter continue to beget. And yet we cannot contradict the Lord when He says, “The children of this world marry and give in marriage.” Some, therefore, are children of this world, and yet are not children of the devil. …