10 In this the children of God are revealed, and the children of the devil. Whoever doesn't do righteousness is not of God, neither is he who doesn't love his brother.
*Minor differences ignored. Grouped by changes, with first version listed as example.
In this the children of God are manifest. He shortly draws this conclusion, that those in vain claim a place and a name among the children of God, who do not prove themselves to be such by a pious and holy life, since by this evidence they shew that they differ from the children of the devil. But he does not mean that they are thus manifested, so as to be openly recognized by the whole world; but his meaning is only this, that the fruit and adoption always appear in the life. Whosoever doeth not righteousness. To do righteousness and to do sin, are here set in opposition the one to the other. Then, to do righteousness is no other thing than to fear God from the heart, and to walk in his commandments as far as human weakness will permit; for though righteousness in a strict sense is a perfect keeping of the law, from which the faithful are always far off; yet as offenses and fallings are not imputed to them by God, righteousness is that imperfect obedience which they render to him. But John declares that all who do not live righteously are not of God, because all those whom God calls, he regenerates by his Spirit. Hence newness of life is a perpetual evidence of divine adoption. Neither he who loveth not his brother. He accommodates a general doctrine to his own purpose. For hitherto he has been exhorting the faithful to brotherly love; now, for the same end, he refers to true righteousness. Hence this clause is added instead of an explanation. But I have already stated the reason why the whole of righteousness is included in brotherly love. The love of God holds, indeed, the first place; but as on it depends love towards men, it is often, as a part for the whole, comprehended under it, and also the latter under the former. Then he declares that every one who is endued with benevolence and humanity, is thus just, and is to be so deemed, because love is rite fulfillment of the law. He confirms this declaration by saying that the faithful had been so taught from the beginning; for by these words he intimates that the statement which he made ought not to have appeared new to them.
In this the children of God are manifest - That is, this furnishes a test of their true character. The test is found in doing righteousness, and in the love of the brethren. The former he had illustrated; the latter he now proceeds to illustrate. The general idea is, that if a person is not truly a righteous person, and does not love the brethren, he cannot be a child of God. Perhaps by the phrase in this, using a pronoun in the singular number, he means to intimate that an important part of righteousness consists in brotherly love.
Whosoever doeth not righteousness, is not of God - In 1-John 3:7, he had said that "he that doeth righteousness is of God."
If that is true, then what he here affirms must be true also, that a man who does not righteousness is not of God. The general idea is the same, that no one can be a true Christian who is not in fact a righteous man.
Neither he that loveth not his brother - The illustration of this point continues to 1-John 3:18. The general sense is, that brotherly love is essential to the Christian character, and that he who does not possess it cannot be a Christian. On the nature and importance of brotherly love as an evidence of piety, see the notes at John 13:34-35.
In this the children of God are manifest - Here is a fearful text. Who is a child of the devil? He that commits sin. Who is a child of God? He that works righteousness. By this text we shall stand or fall before God, whatever our particular creed may say to the contrary.
Neither he that loveth not his brother - No man is of God who is not ready on all emergencies to do any act of kindness for the comfort, relief, and support of any human being. For, as God made of one blood an the nations of men to dwell upon the face of the whole earth, so all are of one family; and consequently all are brethren, and should love as brethren.
(9) In this the children of God are manifest, and the children of the devil: whosoever doeth not righteousness is not of God, (10) neither he that loveth not his brother.
(9) The conclusion: by a wicked life they are known who are governed by the Sprit of the devil: and by a pure life who are God's children.
(10) He begins to commend charity towards the brethren as another mark of the sons of God.
In this the children of God are manifest,.... By regenerating grace, and not sinning, in the sense before explained, in consequence of it: adoption is an act of God's grace and sovereign will; it is secret in his own heart, and is secured in divine predestination, and in the covenant of grace, and is antecedent to regeneration: regeneration and faith do not make men the children of God, but manifest them to be so; adoption makes them the children of God, and entitles them to the inheritance; regeneration gives them the nature of the children of God, and makes them meet for it, and manifests their right unto it; not to the men of the world, but to themselves and other saints:
and the children of the devil; such as imitate him, do his will and his lusts, and are openly under his power and influence; these are distinguishable from regenerate persons, and the children of God, by their lives and conversations; so the people of the nations of the world are called, "the children of Samael", and the serpent, by the Jews (m), which are with them the names of the devil.
Whosoever doth not righteousness is not of God: that is, he does; not appear to be born of God, who does not by faith lay hold on the righteousness of Christ for his justification before God, and acceptance with him; and who does not do works of righteousness in faith from a principle of love, and with a view to the glory of God; for where regenerating grace is, there will be such graces and such practices:
neither he that loveth not his brother; for as he that loveth God, and Christ, and the brethren, appears manifestly to be born again, and to have passed from death to life, so he that does not is in darkness, in a state of unregeneracy, and walks and continues therein; for was he born again, he would be taught of God to love the saints; see 1-John 4:7.
(m) Raya Mehimna in Zohar in Leviticus. fol. 34. 2.
children of the devil--(See on 1-John 3:8; Acts 13:10). There is no middle class between the children of God and the children of the devil.
doeth not righteousness--Contrast 1-John 2:29.
he that loveth not his brother-- (1-John 4:8); a particular instance of that love which is the sum and fulfilment of all righteousness, and the token (not loud professions, or even seemingly good works) that distinguishes God's children from the devil's.
Neither he that loveth not his brother - Here is the transition from the general proposition to one particular.
*More commentary available at chapter level.