Whosoever is born of God does not commit sin; for his nature remains in him: and he cannot sin, because he is born of God.
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Augustine of Hippo
AD 430
Hear intently, I do beseech you, because it is no small matter that we have to cope withal: and I doubt not, because you were intent upon it yesterday, that you have with even greater intentness of purpose come together today. For it is no slight question, how he says in this Epistle, Whosoever is born of God, sins not, 1 John 3:9 and how in the same Epistle he has said above, If we say that we have no sin, we deceive ourselves, and the truth is not in us. 1 John 1:8 What shall the man do, who is pressed by both sayings out of the same Epistle? If he shall confess himself a sinner, he fears lest it be said to him, Then are you not born of God; because it is written, Whosoever is born of God, sins not. But if he shall say that he is just and that he has no sin, he receives on the other side a blow from the same Epistle, If we say that we have no sin, we deceive ourselves, and the truth is not in us. Placed then as he is in the midst, what he can say and what confess, or what profess, he...
And he cannot sin, because he is born of God. Hence Jovinian, Luther, and Calvin taught that a man could not fall away, but was sure of his salvation. But S. John says, "My little children, these things write I unto you, that ye sin not." Consequently they could sin, faithful though they were. And it is contrary to daily experience, for we find daily the faithful becoming heretics and falling into sin. And the Council of Trent (vi23) rules otherwise. What then is S. John"s meaning that he who is born of God cannot sin, that is mortally and gravely? 1. We must take the word collectively—and then it will mean, So long as he preserves the seed of grace, he cannot sin. So Å’cumenius, Thomas Anglicus, Cajetan, and S. Hierom, lib11extra Jovin. And accordingly theologians say that he who has effectual grace cannot sin, because effectual grace in its very conception includes its result. For that grace is called "effectual" which (as is foreseen) will produce its effect, which is to lead our fr...
He cannot sin, because he is born of God. The meaning of this can be no more, than that he cannot sin as long as the seed of grace remaineth in him, and as long as he is the adoptive son of God. But it is evident he may fall from this happy condition, and from the grace of God, otherwise St. John would not so often in this epistle have exhorted them not to sin. (Witham)
And therefore I say to you, that if any one is tempted by the devil, and sins after that great and holy calling. in which the Lord has called His people to everlasting life,