Verse 7. - St. John repeats his declaration with emphasis and fresh considerations; hence the repetition of the tender address (1 John 2:1), "Little children, let no one ever seduce you into the belief that character and practice can be separated. He that doeth righteousness is righteous; for a righteous man inevitably practices righteousness." There are always persons who endeavour to reconcile religion with moral laxity, and in St. John's day some Gnostics definitely taught that conduct was immaterial to the spiritual man, for no external acts could defile such. "The external acts," says St. John, "prove the man's spiritual character and origin. He that doeth righteousness is righteous and is of God: he that doeth sin is of the devil." Note the difference between "even as" in verses 3 and 7. There καθώς introduces a pattern as a fresh motive for self-purification; here it introduces a comparison. Christ is righteous, and his character produces nothing but righteousness; so also is it with the righteous Christian.

3:3-10 The sons of God know that their Lord is of purer eyes than to allow any thing unholy and impure to dwell with him. It is the hope of hypocrites, not of the sons of God, that makes allowance for gratifying impure desires and lusts. May we be followers of him as his dear children, thus show our sense of his unspeakable mercy, and express that obedient, grateful, humble mind which becomes us. Sin is the rejecting the Divine law. In him, that is, in Christ, was no sin. All the sinless weaknesses that were consequences of the fall, he took; that is, all those infirmities of mind or body which subject man to suffering, and expose him to temptation. But our moral infirmities, our proneness to sin, he had not. He that abides in Christ, continues not in the practice of sin. Renouncing sin is the great proof of spiritual union with, continuance in, and saving knowledge of the Lord Christ. Beware of self-deceit. He that doeth righteousness is righteous, and to be a follower of Christ, shows an interest by faith in his obedience and sufferings. But a man cannot act like the devil, and at the same time be a disciple of Christ Jesus. Let us not serve or indulge what the Son of God came to destroy. To be born of God is to be inwardly renewed by the power of the Spirit of God. Renewing grace is an abiding principle. Religion is not an art, a matter of dexterity and skill, but a new nature. And the regenerate person cannot sin as he did before he was born of God, and as others do who are not born again. There is that light in his mind, which shows him the evil and malignity of sin. There is that bias upon his heart, which disposes him to loathe and hate sin. There is the spiritual principle that opposes sinful acts. And there is repentance for sin, if committed. It goes against him to sin with forethought. The children of God and the children of the devil have their distinct characters. The seed of the serpent are known by neglect of religion, and by their hating real Christians. He only is righteous before God, as a justified believer, who is taught and disposed to righteousness by the Holy Spirit. In this the children of God are manifest, and the children of the devil. May all professors of the gospel lay these truths to heart, and try themselves by them.Little children, let no man deceive you,.... Neither by these doctrines, nor by wicked practices, drawing into the belief of the one, or into the performance of the other; suggesting, as the Gnostics did, that knowledge without practice was enough, and that it was no matter how a man lived, provided his notions of the Gospel were right:

he that doeth righteousness, is righteous; not that any man is made righteous by the works of the law, or by his obedience to the law of works, for this is contrary to the express word of God; and besides, the best righteousness of man is imperfect, and can never constitute or denominate him righteous before God; and was he justified by it; it would not only lay a foundation for boasting in him, which ought not to be, but would make the death, the sacrifice, and righteousness of Christ, to be in vain; men are only made righteous by the righteousness of Christ, which be has wrought out which is revealed in the Gospel, and received by faith, and which God imputes without works; so that he that doeth righteousness is he that being convinced of the insufficiency of his own righteousness, and of the excellency and suitableness of Christ's righteousness, renounces his own, and submits to his; who lays hold upon it, receives it, and exercises faith on it, as his justifying righteousness; and, in consequence of this, lives in a course of holiness and righteousness, in opposition to, and distinction from one that commits sin, or lives a sinful course of life; which, though it does not make him righteous in the sight of God, yet it shows him to be righteous in the sight of men, and proves that faith to be right which lays hold on the righteousness of Christ, by which he is truly righteous:

even as he is righteous; as Christ himself is righteous; and so the Syriac version reads; not as personal, or as he is personally and essentially righteous as God; but as mystical, every member of his body being clothed with the same robe of righteousness the whole body of Christ is, and indeed justified by the same righteousness that he as Mediator was, when he rose from the dead, as the representative of his people: moreover, as Christ showed himself to be righteous as man, by doing good, so believers in him, by imitating him, and walking as he walked, show themselves to be good and righteous, like, though not equal to him; for as a tree is known by its fruits, so is a good man by his good works, and a righteous man by doing righteousness; and as good fruit does not make a good tree, but shows it to be good, so good works do not make a good man, nor a man's own righteousness make him a righteous man, but show him to be so.