¹ tn The καί (kai) is epexegetical/explanatory (or perhaps resumptive) of the commandment(s) mentioned in the preceding verse.

² tn This verse begins with the phrase καὶ αὕτη ἐστίν (kai {auth estin; cf. the similar phrase in 3:11 and 1:5), which is explained by the following ἵνα (Jina) clause, “that we believe in the name of his Son Jesus Christ.” The ἵνα thus introduces a clause which is (1) epexegetical (explanatory) or (2) appositional. By analogy the similar phrase in 3:11 is also followed by an epexegetical ἵνα clause and the phrase in 1:5 by an epexegetical ὅτι (Joti) clause.

sn His commandment refers to what follows – the commandment from God is to believe in his Son, Jesus Christ, and to love one another.

³ sn The author of 1 John repeatedly attributes the commandments given to believers as given by God the Father, even though in John 13:34-35 it was Jesus who gave the commandment to love one another. 2 John 4-5 also attributes the commandment to love one another directly to the Father. Thus it is clear that God the Father is the subject of the verb gave here in 3:23.

⁴ sn 1 John 4:1-6. These verses form one of three units within 1 John that almost all interpreters consider a single unit and do not divide up (the other two are 2:12-14 and 15-17). The subject matter is so clearly different from the surrounding context that these clearly constitute separate units of thought. Since the Holy Spirit is not the only spirit active in the world, the author needs to qualify for the recipients how to tell if a spirit comes from God. The “test” is the confession in 4:2.

⁵ tn According to BDAG 255 s.v. δοκιμάζω 1 the verb means “to make a critical examination of someth. to determine genuineness, put to the test, examine.”

⁶ sn Test the spirits. Since in the second half of the present verse the author mentions “false prophets” who have “gone out into the world,” it appears highly probable that his concept of testing the spirits is drawn from the OT concept of testing a prophet to see whether he is a false prophet or a true one. The procedure for testing a prophet is found in Deut 13:2-6 and 18:15-22. An OT prophet was to be tested on the basis of (a) whether or not his predictive prophecies came true (Deut 18:22) and (b) whether or not he advocated idolatry (Deut 13:1-3). In the latter case the people of Israel are warned that even if the prophet should perform an authenticating sign or wonder, his truth or falsity is still to be judged on the basis of his claims, that is, whether or not he advocates idolatry. Here in 1 John the idea of “testing the spirits” comes closer to the second OT example of “testing the prophets” mentioned above. According to 1 John 4:2-3, the spirits are to be tested on the basis of their christological confession: The person motivated by the Spirit of God will confess Jesus as the Christ who has come in the flesh, while the person motivated by the spirit of deceit will not confess Jesus and is therefore not from God. This comes close to the idea expressed by Paul in 1 Cor 12:3 where the person speaking charismatic utterances is also to be judged on the basis of his christological confession: “So I want you to understand that no one speaking by the Spirit of God says, ‘Jesus is cursed,’ and no one can say ‘Jesus is Lord,’ except by the Holy Spirit.”

⁷ tn The phrase “to determine” is not in the Greek text, but is supplied for clarity.

⁸ tn “False prophets” refers to the secessionist opponents (compare 2:19).

⁹ tn Theoretically the pronoun ταῦτα (tauta) could refer (1) to what precedes or (2) to what follows. Since it is followed by a ἵνα (Jina) clause which gives the purpose for the writing, and a new subject is introduced in 5:14 (ἡ παρρησία, Jh parrhsia), it seems almost certain that the ταῦτα in 5:13 refers to preceding material. Even at this, some would limit the referent of ταῦτα (1) only to 5:1-12 or even 5:12, but more likely ταῦτα in 5:13 refers (2) to the entirety of the letter, for two reasons: (a) based on the structural analogy with the Gospel of John, where the conclusion refers to all that has preceded, it is probable that the conclusion to 1 John refers likewise to all that has preceded; and (b) the statement ταῦτα ἔγραψα ὑμῖν (tauta egraya Jumin) in 5:13 forms an inclusion with the statement καὶ ταῦτα γράφομεν ἡμεῖς (kai tauta grafomen Jhmei") at the end of the prologue (1:4) and encompasses the entire body of the letter.

¹⁰ tn The dative participle πιστεύουσιν (pisteuousin) in 5:13 is in simple apposition to the indirect object of ἔγραψα (egraya), ὑμῖν (Jumin), and could be translated, “These things I have written to you, namely, to the ones who believe in the name of the Son of God, in order that you may know.” There is an exact parallel to this structure in John 1:12, where the pronoun is αὐτοῖς (autois) and the participle is τοῖς πιστεύουσιν (toi" pisteuousin) as here.

¹¹ tn This ἵνα (Jina) introduces a clause giving the author’s purpose for writing “these things” (ταῦτα, tauta), which refers to the entirety of the preceding material. The two other Johannine statements about writing, 1 John 1:4 and John 20:31, are both followed by purpose clauses introduced by ἵνα, as here.