¹ tn Grk “and.” The Greek conjunction καί (kai) introduces the apodosis of the conditional sentence.

² tn This is a first-class conditional sentence with εἰ (ei) + aorist indicative in the protasis. Reality is assumed for the sake of argument with a first-class condition.

sn The author here assumes the reality of the protasis (the “if” clause), which his recipients, as believers, would also be expected to agree with: Assuming that God has loved us in this way, then it follows that we also ought to love one another. God’s act of love in sending his Son into the world to be the atoning sacrifice for our sins (v. 10) ought to motivate us as believers to love one another in a similar sacrificial fashion. The author made the same point already in 1 John 3:16. But this failure to show love for fellow believers is just what the opponents are doing: In 1 John 3:17 the author charged them with refusing to love their brothers by withholding needed material assistance. By their failure to love the brothers sacrificially according to the example Jesus set for believers, the opponents have demonstrated again the falsity of their claims to love God and know God (see 1 John 2:9).

³ sn An allusion to John 1:18.

⁴ tn The phrase “God resides in us” (ὁ θεὸς ἐν ἡμῖν μένει, Jo qeo" en Jhmin menei) in 4:12 is a reference to the permanent relationship which God has with the believer. Here it refers specifically to God’s indwelling of the believer in the person of the Holy Spirit, as indicated by 4:13b. Since it refers to state and not to change of status it is here translated “resides” (see 2:6).

⁵ tn The phrase “his [God’s] love is perfected (τετελειωμένη ἐστίν, teteleiwmenh estin) in us” in 4:12 is difficult. First it is necessary to decide whether αὐτοῦ (autou), which refers to God, is (1) subjective (God’s love for us) or (2) objective (our love for God). It is clear that a subjective genitive, stressing God’s love for us, is in view here, because the immediate context, 4:11a, has believers as the objects of God’s love (ὁ θεὸς ἠγάπησεν ἡμᾶς, Jo qeo" hgaphsen Jhma"). The entire phrase ἡ ἀγάπη αὐτοῦ ἐν ἡμῖν τετελειωμένη ἐστίν (Jh agaph autou en Jhmin teteleiwmenh estin) then refers to what happens when believers love one another (note the protasis of the conditional sentence in 4:12, ἐάν ἀγαπῶμεν ἀλλήλους [ean agapwmen allhlou"]). The love that comes from God, the love that he has for us, reaches perfection in our love for others, which is what God wants and what believers are commanded to do (see 3:23b).

⁶ tn Again whether the referent of the phrase ἐν τούτῳ (en toutw) (1) precedes or (2) follows is a problem. This time there are two ὅτι (Joti) clauses which follow. The first is an indirect discourse clause related to γινώσκομεν (ginwskomen) and giving the content of what believers know: “that we reside in him and he in us.” The second ὅτι clause is epexegetical (or explanatory) to the ἐν τούτῳ phrase, explaining how believers know that they reside in God and God remains in them: “in that he has given us of his Spirit.”

sn By this we know. According to the author of 1 John, the Father’s giving of the indwelling Holy Spirit to the believer is one means of providing assurance to the believer of his relationship to God. This is what was also stated in 1 John 3:24b in essentially identical terms.

⁷ tn Grk “in him.” Context indicates that the pronoun refers to God (see 4:12).

⁸ sn The genitive of his Spirit here, like the phrase in 3:24, probably reflects a partitive nuance, so that the author portrays God as ‘apportioning’ his Spirit to individual believers. This leads to the important observation that the author is not particularly interested in emphasizing (1) the ongoing interior witness of the Holy Spirit (which is what the passage is often understood to mean) but is emphasizing (2) the fact that God has given the Spirit to believers, and it is this fact that gives believers assurance of their relationship to God. In other words, it is the fact that the Holy Spirit has been given to believers, rather than the ongoing interior testimony of the Holy Spirit within the believer, which is the primary source of the believer’s assurance.

⁹ tn Grk “Whoever.”

¹⁰ 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.

¹¹ tn The referent of ἐν τούτῳ (en toutw) here is more difficult to determine than most, because while there are both ἵνα (Jina) and ὅτι (Joti) clauses following, it is not clear whether or not they are related to the ἐν τούτῳ. There are actually three possibilities for the referent of ἐν τούτῳ in 4:17: (1) it may refer to the ἵνα clause which immediately follows, so that the love of believers is brought to perfection in that they have confidence in the day of judgment. The main problem with this interpretation is that since the day of judgment is still future, it necessitates understanding the second use of the preposition “in” (second ἐν [en]) to mean “about” or “concerning” with reference to the day of judgment in order to make logical sense. (2) The ἐν τούτῳ may refer to the ὅτι clause in 4:17b, meaning “love is perfected with us…in that just as he [Christ] is, so also are we in this world.” This makes logical sense, and there are numerous cases where ἐν τούτῳ is explained by a ὅτι clause that follows. However, according to this understanding the intervening ἵνα clause is awkward, and there is no other instance of the phrase ἐν τούτῳ explained by a following ὅτι clause where a ἵνα clause intervenes between the two in this way. (3) Thus, the third possibility is that ἐν τούτῳ refers to what precedes in 4:16b, and this also would make logical sense: “By this – by our residing in love so that we reside in God and he resides in us – is love brought to perfection with us.” This has the additional advantage of agreeing precisely with what the author has already said in 4:12: “If we love one another, God remains in us and his love is brought to perfection in us.” Thus option (3) is best, with the phrase ἐν τούτῳ referring to what precedes in 4:16b, and the ἵνα clause which follows indicates the result of this perfection of love in believers: In the future day of judgment they will have confidence. The ὅτι clause would then give the reason for such confidence in the day of judgment: because just as Jesus is, so also are believers in this world – they are already currently in relationship with God just as Jesus is.

¹² tn The preposition μετά (meta) means “with” and modifies the verb τετελείωται (teteleiwtai). If the prepositional phrase modified the noun ἡ ἀγάπη which immediately precedes it, it would almost certainly have the Greek article, thus: ἡ ἀγάπη ἡ μεθ᾿ ἡμῶν (Jh agaph Jh meq’ Jhmwn).

sn To say love is perfected with us means “with regard to our actions in loving our brothers.”

¹³ tn Grk “that one” (a reference to Jesus is indicated in the context). Once more the author uses the pronoun ἐκεῖνος (ekeinos) to refer to Jesus Christ, as he did in 2:6; 3:3, 5, 7, and 16. A reference to Christ is confirmed in this context because the author says that “just as he is, so also are we [believers] in this world” and since 3:2 indicated that believers are to be like God in the future (but are not yet), the only one believers can be like already in the present age is Jesus Christ.