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.

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 Lev. fol. 34. 2.

In this (ἐν τούτῳ)

See on 1 John 2:3.

Children of the devil (τέκνα τοῦ διαβόλου)

The only occurrence of the phrase. Compare Acts 13:10, and see John 8:44.

Righteousness

Here the article is wanting, compare 1 John 3:7. Righteousness is regarded, not in its completeness, but as bearing a particular character. It will be interesting to follow out the same distinction between the following words with and without the article: ἀμαρτία sin; ἀγάπη love; ζωή life; ἀλήθεια truth.

{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.

3:10 In this the children of God are manifest, and the children of the devil. Thus is the distinction clear between God's children and those of the devil. God's children are full of love and live holy lives. Those of the devil are the opposite.

3:10 Neither he that loveth not his brother - Here is the transition from the general proposition to one particular.

Margin righteousness

See Scofield Note: "1Jn 3:7".

10. children of the devil-(See on [2643]1Jo 3:8; Ac 13:10). There is no middle class between the children of God and the children of the devil.

doeth not righteousness-Contrast 1Jo 2:29.

he that loveth not his brother-(1Jo 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.

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.