[5:1] 2 tn The verb γεννάω (gennaw) here means to be fathered by God and thus a child of God. The imagery in 1 John is that of the male parent who fathers children. See the note on “fathered” in 2:29 for further discussion of this imagery.
[5:1] 3 tc ‡ Most witnesses ([א] A P 1739 Ï sy) have καί (kai, “also”) before the article τόν (ton). But the external evidence for the shorter reading is significant (B Ψ 048vid 33 pc sa), and the conjunction looks to be a motivated reading in which scribes emulated the wording of 4:21 (ἀγαπᾷ καὶ τόν, agapa kai ton). NA27 places the conjunction in brackets, indicating doubts as to its authenticity.
[5:1] 4 sn Also loves the child fathered by him. Is the meaning of 5:1b a general observation or a specific statement about God and Christians? There are three ways in which the second half of 5:1 has been understood: (1) as a general statement, proverbial in nature, applying to any parent: “everyone who loves the father also loves the child fathered by him.” (2) This has also been understood as a statement that is particularly true of one’s own parent: “everyone who loves his own father also loves the (other) children fathered by him (i.e., one’s own brothers and sisters).” (3) This could be understood as a statement which refers particularly to God, in light of the context (5:1a): “everyone who loves God who fathered Christians also loves the Christians who are fathered by God.” Without doubt options (2) and (3) are implications of the statement in its present context, but it seems most probable that the meaning of the statement is more general and proverbial in nature (option 1). This is likely because of the way in which it is introduced by the author with πᾶς ὁ (pas Jo) + participle. The author could have been more explicit and said something like, “everyone who loves God also loves God’s children” had he intended option (3) without ambiguity. Yet that, in context, is the ultimate application of the statement, because it ultimately refers to the true Christian who, because he loves God, also loves the brethren, those who are God’s offspring. This is the opposite of 4:20, where the author asserted that the opponents, who profess to love God but do not love the brethren, cannot really love God because they do not love the brethren.
[5:2] 5 tn Once more there is the familiar difficulty of determining whether the phrase refers (1) to what precedes or (2) to what follows. Here, because ἐν τούτῳ (en toutw) is followed by a clause introduced by ὅταν (Jotan) which appears to be related, it is best to understand ἐν τούτῳ as referring to what follows. The following ὅταν clause is epexegetical to ἐν τούτῳ, explaining how we know that we love God’s children: “by this we know that we love God’s children, whenever we love God and keep his commandments.”
