4:15 If anyone 5 confesses that Jesus is the Son of God, God resides 6 in him and he in God.
1 tn Grk “the one saying he is in the light and hating his brother.” Here καί (kai) has been translated as “but” because of the contrast present in the two clauses.
2 tn Grk “his brother.” Here the term “brother” means “fellow believer” or “fellow Christian” (cf. BDAG 18 s.v. ἀδελφός 2.a). In the repeated uses of this form of address throughout the letter, it is important to remember that sometimes it refers (1) to genuine Christians (those who have remained faithful to the apostolic eyewitness testimony about who Jesus is, as outlined in the Prologue to the letter, 1:1-4; an example of this usage is 2:10; 3:14, 16), but often it refers (2) to the secessionist opponents whose views the author rejects (examples are found here at 2:9, as well as 2:11; 3:10; 3:15; 3:17; 4:20). Of course, to be technically accurate, in the latter case the reference is really to a “fellow member of the community”; the use of the term “fellow Christian” in the translation no more implies that such an individual is genuinely saved than the literal term “brother” which the author uses for such people. But a translation like “fellow member of the community” or “fellow member of the congregation” is extremely awkward and simply cannot be employed consistently throughout.
3 tn The mood of γινώσκετε (ginwskete) may be understood as (1) indicative or (2) imperative. It is better to understand the verb here as indicative, because in 1 John “knowledge” is something one has as a result of being a believer (2:3, 5, 20, 21; 3:16, 19, 24; 4:2, 13; 5:2) rather than something one has to be exhorted about. The change in verbs from οἶδα (oida) to γινώσκω (ginwskw) is another example of Johannine stylistic variation.
4 tn The verb γεννάω (gennaw) presents a translation problem: (1) should the passive be translated archaically “be begotten” (the action of the male parent; see BDAG 193 s.v. 1.a) or (2) should it be translated “be born” (as from a female parent; see BDAG 194 s.v. 2)? A number of modern translations (RSV, NASB, NIV) have opted for the latter, but (3) the imagery expressed in 1 John 3:9 clearly refers to the action of the male parent in procreating a child, as does 5:1 (“everyone who loves the father loves the child fathered by him”), and so a word reflecting the action of the male parent is called for here. The contemporary expression “fathered by” captures this idea.
5 tn Grk “Whoever.”
6 tn Here μένει (menei, from μένω [menw]) has been translated as “resides” because the confession is constitutive of the relationship, and the resulting state (“God resides in him”) is in view.