1 John 2:21

2:21 I have not written to you that ¹  you do not know the truth, but that ²  you do know it, and that ³  no lie is of the truth.

1 John 5:15

5:15 And if we know ⁴  that he hears us in regard to whatever we ask, then we know that we have the requests that we have asked from him.

1 John 2:20

2:20 Nevertheless you have an anointing from the Holy One, and you all know. ⁵ 

1 John 2:29

2:29 If you know that he is righteous, you also know ⁶  that everyone who practices righteousness has been fathered ⁷  by him.

1 John 3:5

3:5 And you know that Jesus ⁸  was revealed to take away ⁹  sins, and in him there is no sin.

1 John 5:19

5:19 We know that we are from God, ¹⁰  and the whole world lies in the power of the evil one.

1 John 3:14-15

3:14 We know that ¹¹  we have crossed over ¹²  from death to life ¹³  because ¹⁴  we love our fellow Christians. ¹⁵  The one who does not love remains in death. ¹⁶  3:15 Everyone who hates his fellow Christian ¹⁷  is a murderer, ¹⁸  and you know that no murderer has eternal life residing ¹⁹  in him.

1 John 5:13

Assurance of Eternal Life

5:13 I have written these things ²⁰  to you who believe ²¹  in the name of the Son of God so that ²²  you may know that you have eternal life.

1 John 2:11

2:11 But the one who hates his fellow Christian ²³  is in the darkness, walks in the darkness, and does not know where he is going, because the darkness has blinded his eyes. ²⁴ 

1 John 3:1-2

3:1 (See what sort of love the Father has given to us: that ²⁵  we should be called God’s children – and indeed ²⁶  we are! ²⁷  For this reason ²⁸  the world does not know us: because it did not know him. ²⁹  3:2 Dear friends, we are God’s children now, and what we will be ³⁰  has not yet been revealed. We ³¹  know that ³²  whenever ³³  it ³⁴  is revealed ³⁵  we will be like him, because ³⁶  we will see him just as he is. ³⁷ 

1 John 5:16

5:16 If ³⁸  anyone sees his fellow Christian ³⁹  committing a sin not resulting in death, ⁴⁰  he should ask, and God ⁴¹  will grant ⁴²  life to the person who commits a sin not resulting in death. ⁴³  There is a sin resulting in death. ⁴⁴  I do not say that he should ask about that.

1 John 5:18

5:18 We know that everyone fathered ⁴⁵  by God does not sin, but God ⁴⁶  protects ⁴⁷  the one he has fathered, and the evil one cannot touch him.

1 John 5:20

5:20 And we know that the Son of God has come and has given us insight to know ⁴⁸  him who is true, and we are in him who is true, in his Son Jesus Christ. This one ⁴⁹  is the true God and eternal life.

[2:21]  ¹ tn The interpretation of the three ὅτι clauses in v. 21 is very difficult: (1) All three instances of ὅτι (Joti) may be causal (so NASB, NIV, NEB). (2) The first two may be causal while the third indicates content (declarative or recitative ὅτι, so KJV, RSV, TEV, NRSV). (3) However, it is best to take all three instances as indicating content because this allows all three to be subordinate to the verb ἔγραψα (egraya) as compound direct objects. The author writes to reassure his readers (a) that they do indeed know the truth (first two uses of ὅτι) and (b) that no lie is of the truth (third use).

[2:21]  ² tn See the note on the first occurrence of “that” in v. 21.

[2:21]  ³ tn See the note on the first occurrence of “that” in v. 21.

[5:15]  ⁴ tn This use of ἐάν (ean) with the indicative mood rather than the subjunctive constitutes an anomalous usage. Here ἐάν is used instead of ἐι (ei) to introduce a first-class condition: “if we know (οἴδαμεν, oidamen) that he hears us in regard to whatever we ask, then we know that we have the requests which we have asked from him.” The reality of the condition (protasis) is assumed for the sake of argument; given the protasis, the apodosis follows. The use of ἐάν for ἐι is rare but not without precedent; see M. Zerwick (Biblical Greek §§330-31).

[2:20]  ⁷ tc πάντες (pantes, nominative plural in “you all know”) is read by א B P Ψ sa. A C 049 33 1739 Ï latt sy bo have the accusative πάντα (panta, “you know all things”). The evidence favors the nominative reading, but it is not overwhelming. At the same time, the internal evidence supports the nominative for a variety of reasons. A scribe would naturally tend to give the transitive verb a direct object, especially because of the parallel in the first half of the verse. And intrinsically, the argument seems to be in balance with v. 19: The “all” who have gone out and are not “in the know” with the “all” who have an anointing and know that they are true believers. Further, as R. E. Brown points out, “the fact of their knowledge (pantes), not the extent of its object (panta), seems best to fit the reassurance” (Epistles of John [AB], 349). Brown further points out the connection with the new covenant in Jer 31 with this section of 1 John, esp. Jer 31:34 – “they all [pantes] shall know me.” Since 1 John alludes to Jer 31, without directly quoting it, this is all the more reason to see the nominative as original: Allusions are often overlooked by scribes (transcriptional evidence), but support the intrinsic evidence. Thus, the evidence is solidly (though not overwhelmingly) behind the nominative reading.

[2:29]  ¹⁰ 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.

[2:29]  ¹¹ 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.

[3:5]  ¹³ tn Grk “that one.” The context makes it clear that this is a reference to Jesus, because the reader is told “he was revealed in order that he might take away sins.” The connection with Jesus as the Lamb of God who takes away the sin of the world in John 1:29 provides additional confirmation that the previous use of ἐκεῖνος (ekeinos) in 3:3b should also be understood as a reference to Jesus, as 2:6 was.

[3:5]  ¹⁴ tn The ἵνα (Jina) clause gives the purpose of Jesus’ self-revelation as he manifested himself to the disciples and to the world during his earthly life and ministry: It was “to take away sins.”

[5:19]  ¹⁶ tn The preposition ἐκ (ek) here indicates both source and possession: Christians are “from” God in the sense that they are begotten by him, and they belong to him. For a similar use of the preposition compare the phrases ἐκ τοῦ πατρός (ek tou patro") and ἐκ τοῦ κόσμου (ek tou kosmou) in 1 John 2:16.

[3:14]  ¹⁹ tn The first ὅτι (Joti) clause, following a verb of perception, introduces an indirect discourse clause giving the content of what the readers are assumed to know: that they have passed over from death to life, that is, that they possess eternal life. The author gives a similar reassurance to his readers in 5:13. Alternation between the verbs οἶδα (oida) and γινώσκω (ginwskw) in 1 John is probably a matter of stylistic variation (of which the writer is extremely fond) rather than indicative of a subtle difference in meaning.

[3:14]  ²⁰ tn This verb essentially means “to transfer from one place to another, go/pass over,” according to BDAG 638 s.v. μεταβαίνω 1.

[3:14]  ²¹ sn Cf. John 5:24, where this phrase also occurs.

[3:14]  ²² tn The second ὅτι (Joti) clause in 3:14 is also related to οἴδαμεν (oidamen), but in this case the ὅτι is causal, giving the reason why the readers know that they have passed from death to life: because they love the brothers.

[3:14]  ²³ tn See note on the phrase “fellow Christian” in 2:9.

[3:14]  ²⁴ sn The one who does not love remains in death. Again, the author has the secessionist opponents in view. Their refusal to show love for the brothers demonstrates that they have not made the transition from (spiritual) death to (spiritual) life, but instead have remained in a state of (spiritual) death.

[3:15]  ²² tn See note on the phrase “fellow Christian” in 2:9.

[3:15]  ²³ sn Everyone who hates his fellow Christian is a murderer. On one level it is easy to see how the author could say this; the person who hates his brother is one and the same with the person who murders his brother. Behind the usage here, however, is John 8:44, the only other occurrence of the Greek word translated murderer (ἀνθρωποκτόνος, anqrwpoktonos) in the NT, where the devil is described as a “murderer from the beginning.” John 8:44 refers to the devil’s role in bringing death to Adam and Eve, but even more to his involvement (not directly mentioned in the Genesis account, but elaborated in the intertestamental literature, especially the writings of Philo) in Cain’s murder of his brother Abel. This was the first incident of murder in human history and also the first outward demonstration of the full implications of sin’s entry into the world. Ultimately, then, the devil is behind murder, just as he was behind Cain’s murder of Abel. When the hater kills, he shows himself to be a child of the devil (cf. 1 John 3:10). Once again, conduct is the clue to paternity.

[3:15]  ²⁴ tn The verb μένω (menw) in 3:15 refers to a spiritual reality (eternal life) which in this case does not reside in the person in question. To speak in terms of eternal life not “residing” in such an individual is not to imply that at some time in the past this person did possess eternal life and subsequently lost it, however. The previous verse (3:14) makes it clear that the individual under discussion here has “remained” in death (the realm of spiritual death) and so has never possessed eternal life to begin with, no matter what he may have claimed. Taken together with the use of μένω in 3:14, the use here implies that the opponents have “remained” in death all along, and have not ever been genuine believers. Thus “residing” rather than “remaining” is used as the translation for μένουσαν (menousan) here.

[5:13]  ²⁵ 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.

[5:13]  ²⁶ 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.

[5:13]  ²⁷ 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.

[2:11]  ²⁸ sn The one who hates his fellow Christian. The author’s paradigm for the opponents portrays them as those who show hatred for fellow Christians (Grk “brothers,” but not referring to one’s physical siblings). This charge will be much more fully developed in chap. 3, where the author will compare the opponents to Cain (who is the model for one who hates a brother, since he ultimately murdered his own brother). In 1 John 3:17 the specific charge against the opponents will be failing to give material aid to a brother in need.

[2:11]  ²⁹ sn 1 John 2:3-11. The section 2:3-11 contains three claims to intimate knowledge of God, each introduced by the phrase the one who says (participles in the Greek text) in 2:4, 6, and 9. As with the three claims beginning with “if” in the previous section (1:6, 8, 10), these indirectly reflect the claims of the opponents. Each claim is followed by the author’s evaluation and its implications.

[3:1]  ³¹ tn The ἵνα (Jina) clause is best understood (1) as epexegetical (or explanatory), clarifying the love (ἀγάπην, agaphn) that the Father has given to believers. Although it is possible (2) to regard the ἵνα as indicating result, the use of ποταπήν (potaphn, “what sort of”) to modify ἀγάπην suggests that the idea of “love” will be qualified further in the following context, and this qualification is provided by the epexegetical ἵνα clause.

[3:1]  ³² tn “Indeed” is not in the Greek text but is supplied to indicate emphasis.

[3:1]  ³³ tc The phrase καὶ ἐσμεν (kai esmen, “and we are”) is omitted in 049 69 Ï. There seems to be no theological reason to omit the words. This has all the earmarks of a classic case of homoioteleuton, for the preceding word (κληθῶμεν, klhqwmen, “we should be called”) ends in -μεν (-men).

[3:1]  ³⁴ tn Lexically it is clear that this phrase indicates reason, but what is not clear is whether (1) τοῦτο (touto) refers to what follows, (2) to what precedes, or (3) to both (as with the ἐν τοῦτο [en touto] phrases throughout 1 John). Διὰ τοῦτο (dia touto) occurs 15 times in the Gospel of John, and a pattern emerges which is so consistent that it appears to be the key to the usage here. Six times in the Gospel of John (5:16, 18; 8:47; 10:17; 12:18, 39) the phrase refers to what follows, and in each of these instances an epexegetical ὅτι (Joti) clause follows. Nine times in John (1:31, 6:65, 7:21-22, 9:23, 12:27, 13:11, 15:19, 16:15, 19:11) the phrase refers to what precedes, and in none of these instances is it followed by a ὅτι clause. The phrase διὰ τοῦτο is used three times in the Johannine Epistles. In two of these (1 John 4:5, 3 John 10) there is no ὅτι clause following, and so the διὰ τοῦτο should refer to preceding material. Here in 3:1 there is an epexegetical ὅτι clause following, so the διὰ τοῦτο should (unless it is the only exception in the Gospel of John and the Johannine Epistles) refer to what follows, that is, to the ὅτι clause itself. This is indicated by the colon in the translation.

[3:1]  ³⁵ sn The pronoun him is a clear reference to Jesus Christ (compare John 1:10).

[3:2]  ³⁴ tn The subject of the third person singular passive verb ἐφανερώθη (efanerwqh) in 3:2 is the following clause τί ἐσόμεθα (ti esomeqa): “Beloved, now we are children of God, and what we shall be has not yet been revealed.”

[3:2]  ³⁵ tc The Byzantine text, the Syriac Peshitta, the Bohairic Coptic, and one ms of the Sahidic Coptic supply δέ (de) after οἴδαμεν (oidamen) in 3:2b. Additions of coordinating conjunctions such as δέ are predictable variants; this coupled with the poor external credentials suggests that this addition is not likely to be original.

[3:2]  ³⁶ tn The first ὅτι (Joti) in 3:2 follows οἴδαμεν (oidamen), a verb of perception, and introduces an indirect discourse clause which specifies the content of what believers know: “that whenever it should be revealed, we shall be like him.”

[3:2]  ³⁷ tn In this context ἐάν (ean) does not indicate (1) uncertainty about whether or not what believers will be shall be revealed, but rather (2) uncertainty about the exact time the event will take place. In the Koine period ἐάν can mean “when” or “whenever” and is virtually the equivalent of ὅταν (Jotan; see BDAG 268 s.v. ἐάν 2). It has this meaning in John 12:32 and 14:3. Thus the phrase here should be translated, “we know that whenever it is revealed.”

[3:2]  ³⁸ tn Many take the understood subject (“he”) of φανερωθῇ (fanerwqh) as a reference to Jesus Christ, because the same verb was used in 2:28 in reference to the parousia (second advent). In the immediate context, however, a better analogy is ἐφανερώθη τί ἐσόμεθα (efanerwqh ti esomeqa) in 3:2a. There the clause τί ἐσόμεθα is the subject of the passive verb: “what we shall be has not yet been revealed.” From a grammatical standpoint it makes better sense to see the understood subject of φανερωθῇ as “it” rather than “he” and as referring back to the clause τί ἐσόμεθα in 3:2a. In the context this makes good sense: “Beloved, now we are children of God, and what we shall be has not yet been revealed. We know that whenever it shall be revealed, we shall be like him, because we shall see him just as he is.” This emphasizes the contrast in the verse between the present state (“not yet been revealed”) and the future state (“shall be revealed”) of believers, and this will of course take place at the parousia.

[3:2]  ³⁹ sn Is revealed. It may well be that the use of the same passive verb here (from φανερόω, fanerow) is intended to suggest to the reader the mention of the parousia (Christ’s second coming) in 2:28.

[3:2]  ⁴⁰ tn The second ὅτι (Joti) in 3:2 is best understood as causal, giving the reason why believers will be like God: “we shall be like him, because we shall see him just as he is.”

[3:2]  ⁴¹ sn The phrase we will be like him, because we will see him just as he is has been explained two ways: (1) believers will really become more like God than they now are, and will do this through seeing God as he really is; or (2) believers will realize that they are already like God, but did not realize it until they see him as he is. One who sees a strong emphasis on realized eschatology in the Gospel of John and the Epistles might opt for the second view, since it downplays the difference between what believers already are in the present age and what they will become in the next. It seems better, though, in light of the statement in 3:2a that “what we will be has not yet been revealed” and because of the reference to Christ’s parousia in 2:28, that the author intends to distinguish between the present state of believers and what they will be like in the future. Thus the first view is better, that believers really will become more like God than they are now, as a result of seeing him as he really is.

[5:16]  ³⁷ tn Again ἐάν (ean) in 5:16 introduces (as in 5:14) a third-class condition, but this time, with the future indicative (αἰτήσει, aithsei) in the apodosis, the condition is known as “more probable future.” As BDF §371.4 points out, such a condition describes what is to be expected under certain circumstances. If a person sees his Christian brother committing a sin not to death, it is expected that he will make intercession for the sinning brother (“he should ask…”), and that life will be granted to the sinner in answer to the request. The author has already pointed out in 5:14-15 that if believers make requests of God in accordance with his will they may have confidence that they will receive the requests they have asked for, and this is a specific instance.

[5:16]  ³⁸ tn See note on the phrase “fellow Christian” in 2:9.

[5:16]  ³⁹ tn Grk “a sin not to death.”

[5:16]  ⁴⁰ tn Grk “he” (see the note on the word “grant” later in this verse for discussion).

[5:16]  ⁴¹ tn The referent of the (understood) third person subject of δώσει (dwsei) in 5:16 is difficult to determine. Once again the author’s meaning is obscure. Several possibilities have been suggested for the referent of the subject of this verb: (1) From a grammatical and syntactical standpoint, it would be easiest to understand the subject of δώσει in 5:16 as the person who makes the request, since this person is the subject of the preceding verb αἰτήσει (aithsei) and the following verb ἐρωτήσῃ (erwthsh). From a theological standpoint this is extremely difficult, however, since it would make the person who prays for the sinner the giver of life, and it is questionable whether the author (for whom God is the ultimate source of life) would say that one believer could ‘give’ life to another. In this case the meaning would be: “he [the petitioner] should ask, and he [the petitioner] will grant life to him [the sinner], namely, to those who sin not to death.” (2) Another option is to see God as the subject of δώσει in 5:16 and the Giver of life to the sinner. This is far more consistent theologically with the author’s perspective on God as the Giver of life everywhere else, but it is awkward grammatically (as explained in reference to the previous position above) because it involves a shift in subjects for the three third-person verbs in the context from the person who makes the request (αἰτήσει) to God (δώσει) and back to the person who makes the request (ἐρωτήσῃ). In this case the meaning would be: “he [the petitioner] should ask, and he [God] will grant life to him [the sinner], namely, to those who sin not to death.” (3) A third possibility is to see God as the subject of δώσει in 5:16, but the person who makes the request (rather than the sinner) as the referent of the indirect object αὐτῷ (autw) in 5:16. This is possible because the indirect object αὐτῷ is singular, while the dative substantival participle τοῖς ἁμαρτάνουσιν (toi" Jamartanousin) which follows (which clearly refers to those who sin) is plural. Thus the meaning would be: “he [the petitioner] should ask, and he [God] will grant life to him [the petitioner], with reference to [his praying for] those who sin not to death.” Although this is a difficult and awkward construction no matter what solution one takes, on the whole the second alternative seems most probable. Even if option (1) is preferred it must be acknowledged that God is ultimately the source of life, although it is given as a result of the petitioner’s intercessory prayer and the petitioner becomes, in a sense, the intermediate agent. But in the preceding context (5:11) the author has emphasized that God is the Giver of life, and in spite of the awkwardness in the change of subjects, that would seem to be the most likely meaning here, so option (2) is preferred. Option (3) is improbable because it seems clear that it should be the sinner for whom intercession is made, rather than the petitioner, who is the recipient of life. The petitioner would be assumed to possess life already or he could not be making a request which God would hear. In this case the change from the singular dative indirect object (αὐτῷ) to the plural dative substantival participle (τοῖς ἁμαρτάνουσιν) is merely a loose construction (which by this time should come as no surprise from the author).

[5:16]  ⁴² tn Grk “a sin not to death.”

[5:16]  ⁴³ tn Grk “a sin to death.”

[5:18]  ⁴⁰ tn The concept represented by 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 2:29).

[5:18]  ⁴¹ tn Grk “he”; see the note on the following word “protects.”

[5:18]  ⁴² tn The meaning of the phrase ὁ γεννηθεὶς ἐκ τοῦ θεοῦ τηρεῖ αὐτόν (Jo gennhqeis ek tou qeou threi auton) in 5:18 is extraordinarily difficult. Again the author’s capacity for making obscure statements results in several possible meanings for this phrase: (1) “The fathering by God protects him [the Christian].” Here a textual variant for ὁ γεννηθείς (ἡ γέννησις, Jh gennhsi") has suggested to some that the passive participle should be understood as a noun (“fathering” or perhaps “birth”), but the ms evidence is extremely slight (1505 1852 2138 latt [sy^h] bo). This almost certainly represents a scribal attempt to clarify an obscure phrase. (2) “The One fathered by God [Jesus] protects him [the Christian].” This is a popular interpretation, and is certainly possible grammatically. Yet the introduction of a reference to Jesus in this context is sudden; to be unambiguous the author could have mentioned the “Son of God” here, or used the pronoun ἐκεῖνος (ekeinos) as a reference to Jesus as he consistently does elsewhere in 1 John. This interpretation, while possible, seems in context highly unlikely. (3) “The one fathered by God [the Christian] protects himself.” Again a textual problem is behind this alternative, since a number of mss (א A^c P Ψ 33 1739 Ï) supply the reflexive pronoun ἑαυτόν (Jeauton) in place of αὐτόν in 5:18. On the basis of the external evidence this has a good possibility of being the original reading, but internal evidence favors αὐτόν as the more difficult reading, since ἑαυτόν may be explained as a scribal attempt at grammatical smoothness. From a logical standpoint, however, it is difficult to make much more sense out of ἑαυτόν; to say what “the Christian protects himself” means in the context is far from clear. (4) “The one fathered by God [the Christian] holds on to him [God].” This results in further awkwardness, because the third person pronoun (αὐτοῦ, autou) in the following clause must refer to the Christian, not God. Furthermore, although τηρέω (threw) can mean “hold on to” (BDAG 1002 s.v. 2.c), this is not a common meaning for the verb in Johannine usage, occurring elsewhere only in Rev 3:3. (5) “The one fathered by God [the Christian], he [God] protects him [the Christian].” This involves a pendant nominative construction (ὁ γεννηθεὶς ἐκ τοῦ θεοῦ) where a description of something within the clause is placed in the nominative case and moved forward ahead of the clause for emphatic reasons. This may be influenced by Semitic style; such a construction is also present in John 17:2 (“in order that everyone whom You have given to him, he may give to them eternal life”). This view is defended by K. Beyer (Semitische Syntax im Neuen Testament [SUNT], 1:216ff.) and appears to be the most probable in terms both of syntax and of sense. It makes God the protector of the Christian (rather than the Christian himself), which fits the context much better, and there is precedent in Johannine literature for such syntactical structure.

[5:20]  ⁴³ tn The ἵνα (Jina) introduces a purpose clause which gives the purpose of the preceding affirmation: “we know that the Son of God has come and has given us insight (so that we may) know him who is true.”

[5:20]  ⁴⁴ sn The pronoun This one (οὗτος, Joutos) refers to a person, but it is far from clear whether it should be understood as a reference (1) to God the Father or (2) to Jesus Christ. R. E. Brown (Epistles of John [AB], 625) comments, “I John, which began with an example of stunning grammatical obscurity in the prologue, continues to the end to offer us examples of unclear grammar.” The nearest previous antecedent is Jesus Christ, immediately preceding, but on some occasions when this has been true the pronoun still refers to God (see 1 John 2:3). The first predicate which follows This one in 5:20, the true God, is a description of God the Father used by Jesus in John 17:3, and was used in the preceding clause of the present verse to refer to God the Father (him who is true). Yet the second predicate of This one in 5:20, eternal life, appears to refer to Jesus, because although the Father possesses “life” (John 5:26, 6:57) just as Jesus does (John 1:4, 6:57, 1 John 5:11), “life” is never predicated of the Father elsewhere, while it is predicated of Jesus in John 11:25 and 14:6 (a self-predication by Jesus). If This one in 5:20 is understood as referring to Jesus, it forms an inclusion with the prologue, which introduced the reader to “the eternal life which was with the Father and was manifested to us.” Thus it appears best to understand the pronoun This one in 5:20 as a reference to Jesus Christ. The christological affirmation which results is striking, but certainly not beyond the capabilities of the author (see John 1:1 and 20:28): This One [Jesus Christ] is the true God and eternal life.