He who sins is of the devil, for the devil has been sinning from the beginning. To this end the Son of God was revealed, that he might destroy the works of the devil.
For this purpose the Son of God was manifested He repeats in other words what he had before said, that Christ came to take away sins. Hence two conclusions are to be drawn, that those in whom sin reigns cannot be reckoned among the members of Christ, and that they can by no means belong to his body; for wherever Christ puts forth his own power, he puts the Devil to flight as well as sin. And this is what John immediately adds; for the next sentence, where he says that those who sin not are born of God, is a conclusion from what is gone before. It is an argument drawn from what is inconsistent, as I have already said; for the kingdom of Christ, which brings righteousness with it, cannot admit of sin. But I have already said what not to sin means. He does not make the children of God wholly free from all sin; but he denies that any can really glory in this distinction, except those who from the heart strive to form their life in obedience to God. 