In the verse under consideration, verse 29, “He is righteous,” according to the connection of verses 27 and 28, refers to Christ. From Him believers received the anointing, and He will appear as Judge at His coming.
But in the same verse the word “He” signifies not Christ, but God the Father, from whom everyone who does righteousness has been born.
For the expression that a believer is born of Christ, or of the Son of God, is not used in the language of the New Testament writings. Moreover, the following verses speak only of birth from God, children of God, and adoption by God.
So also in later sayings: 1 Jn 3:1, 2, 8, 9, 10; 1 Jn 4:7; 1 Jn 5:1, 4, 18.
Thus the word “He” in this verse appears to be used both of Christ and of God the Father. In the first saying it refers to Christ, and in the last to God the Father.
There is no defining separation between the One and the Other, but rather their mutual union; so also in verses 1, 2, 3 and later in chapter 3.
What does this mean? It means that the apostle is so deeply penetrated by the thought of the highest mystery of the inseparability of the Triune Godhead that, when speaking, for example, of the regeneration of a believer, he speaks of the Godhead in three Hypostases with a certain indefiniteness.
Yet one cannot fail to see that this indefinite inseparability of the Persons is without confusion. The regeneration of man into new life is attributed to all the Persons of the worshipful Trinity, as an action common to them all.
Therefore it is ascribed both to God in general, as below in 5:4, and in particular to God the Father; cf. Jas 1:17-18; 1 Pet 1:3; Tit 3:5.
It is also ascribed to God the Son, as in Eph 2:15 and 2 Cor 5:17, and to God the Holy Spirit (Jn 3:3, 5, 6).
Therefore there is nothing strange or astonishing if the apostle, speaking in the present verse about the Father and the Son, speaks of those born of God as born of Christ, or as adopted by God through His Son.
Further on he speaks of the children of God as children of God the Son. The expression “children of the Son of God” is unusual and cannot be usual, since in the Most Holy Trinity the Father and the Son are equal and co-honored.
This is why the apostle, speaking in one sentence of the Father and the Son in the one God, designates both the One and the Other by one pronoun: “He.”
“That He,” that is, Jesus Christ, “is righteous,” according to His person and messianic dignity. He is righteous not only in the sense of being just, a property the apostle above attributes to God the Father (1 Jn 1:9; cf. note).
Yet, because of the connection with verse 28, the notion of righteousness in the sense of justice at Christ’s judgment during His coming is also included here.
He is righteous also as the One who in His own person and work fulfilled all righteousness; cf. Mt 3:15 and note.
By virtue of this, He justifies believers in Him before God. He requires righteousness from them in life, and by the power and action of the Holy Spirit grants them justification before God and righteousness before the law of the Spirit of Christ.
“Some might ask what they must do to become pleasing to Him. The apostle teaches this also, saying: if you have known that He is righteous, then without doubt you know that he who does righteousness has been born of Him.
For the Righteous One begets the righteous. Each of you knows what great honor and boldness this brings, and what great and abundant grace and love He gives us” (Theophylact).
If He is righteous, and if you know this firmly and without doubt, then together with this you must also know firmly and without doubt that everyone who does righteousness has been born of Him, that is, of God.
To do, or to practice, righteousness in the language of Scripture usually means to act according to righteousness, to have uprightness in the heart, or, what is the same, to do the will of God, withdrawing from evil.
Then conscience justifies our actions and does not condemn them.
“Born of Him”; see the note on 1 Pet 1:3, 23. This means spiritual birth from above, by water and the Spirit in the mystery of Christian baptism, or regeneration, about which Christ teaches; cf. Jn 3:2-6 and note.
“Everyone,” therefore, means that regeneration, or adoption by God, does not extend to all, and not all the regenerate can be called sons of God.
Christ died and became the propitiation for the sins of the whole world (1 Jn 2:2). But only those who do or practice righteousness, and who fulfill the will of God according to righteousness, can be called born of God, or sons of God...