The letter ends without a benediction, a greeting list, or an amen. It ends with a case: someone in the assembly wanders, someone else goes after him. Verse 19 is the protasis; v. 20 is the apodosis and the letter’s last word.

Three things carry the weight here. First, the address. Ἀδελφοί μου returns for the last time — James’s structural marker, used eleven times, always at a seam — and it locates the whole scenario inside the family. Second, ἐν ὑμῖν. The one who goes astray is not an outsider; the drift James is treating is internal. Third, the two indefinites. τις … τις: neither party is named, neither is an office-holder. James has just finished commending the prayer of any δίκαιος (v. 16) and the elders’ prayer over the sick (v. 14); here the restorer is simply someone.

The two verbs are a matched pair drawn from the same road-imagery: πλανηθῇ (be led astray off the path) and ἐπιστρέψῃ (turn back). The corpus has already fixed πλανάω as ‘be led astray’ precisely so that this pairing stays visible — a wanderer and a turning, not a false believer and a corrected opinion. Verse 20 confirms the field with ἐκ πλάνης ὁδοῦ αὐτοῦ, ‘out of the wandering of his way.’

The genuinely open questions: whether πλανηθῇ is a true passive (led astray by someone or something) or a permissive middle-in-passive-form (let himself wander); and, more consequentially for the sentence, whether the wanderer is a believer who can be lost. James does not say. He describes the case and states the outcome.

Proposed — pending reviewRalph P. Martin, James, Word Biblical Commentary 48 (Waco, TX: Word Books, 1988)

The vocative recurs at 1:2, 16, 19; 2:1, 5, 14; 3:1, 10, 12; 5:12, 19 — every occurrence at a structural seam, and the intensified ἀδελφοί μου ἀγαπητοί reserved for the three sharpest corrections (1:16, 19; 2:5).

Per the standing corpus policy: the masculine plural stands as written, the possessive μου is retained without exception, and the mixed referent is footnoted rather than built into the rendering. James himself supplies the internal evidence at 2:15 (ἀδελφὸς ἢ ἀδελφή), where he marks the feminine when he chooses to — which is exactly why the unmarked masculine plural here need not be expanded.

What the address does at 5:19 is set the frame for everything that follows: the wandering is a family matter, the pursuit is a family obligation, and the writer stands inside the family that has both.

The root image is wandering off a road — the strayed sheep of Isa 53:6 LXX (πάντες ὡς πρόβατα ἐπλανήθημεν), taken up at 1 Pet 2:25 (ἦτε γὰρ ὡς πρόβατα πλανώμενοι), and the lost sheep of Matt 18:12-13. The metaphor is live in Koine, not dead, and James proves it live himself: v. 20 glosses the participle with ἐκ πλάνης ὁδοῦ αὐτοῦ — out of the wandering of his road.

That is why the corpus gloss is be led astray and not ‘be deceived.’ ‘Deceive’ has become a colorless English term for holding a false belief; it discards the road, and with it the pairing with ἐπιστρέφω, which is a turning-verb and makes no sense against a cognition-verb. ‘Err’ (Vulgate erraverit, and the older English tradition) preserves the wandering etymologically but no longer conveys it to a modern ear.

Note the wider Jamesian frame: μὴ πλανᾶσθε at 1:16, warning them off a false inference about God, brackets the letter with the πλανηθῇ of 5:19. What was a warning becomes a case.

ἀπό + gen is separation, per standing policy, never agency. The pairing matters: v. 19 has ἀπὸ τῆς ἀληθείας (away from a standard) and v. 20 has ἐκ πλάνης ὁδοῦ αὐτοῦ (out of a condition). Two prepositions, two different relations, and English must keep them distinct.

ἀλήθεια is articular. James uses the noun three times: λόγῳ ἀληθείας (1:18, the word by which God gave them birth), ψεύδεσθε κατὰ τῆς ἀληθείας (3:14, where truth is what boasting lies against), and here. The distribution suggests something with content and definiteness — the gospel word of 1:18 — rather than truthfulness as a quality.

Proposed — pending reviewDale C. Allison Jr., A Critical and Exegetical Commentary on the Epistle of James, International Critical Commentary (London: Bloomsbury T&T Clark, 2013)

The standing corpus entry fixes ἐπιστρέφω as turn / turn back, the LXX equivalent of שׁוּב and the prophetic verb of covenantal turning (Deut 30:2; Isa 45:22; Hos 14:2), carried into the NT as the ordinary verb of conversion (1 Thess 1:9; Acts 15:19; 1 Pet 2:25).

What is unusual at Jas 5:19 is the transitive active with a personal object. The verb is overwhelmingly intransitive in the NT — one turns, one is turned. Transitive uses are rare and concentrated: Luke 1:16-17 (John will turn many of the sons of Israel to the Lord; turn the hearts of fathers), and here twice (5:19 ἐπιστρέψῃ τις αὐτόν, 5:20 ὁ ἐπιστρέψας ἁμαρτωλόν). The construction makes one human being the agent of another’s turning — which is precisely the astonishing claim v. 20 then unpacks.

Rendering notes: keep a turning-word, so that the wandering of πλανάω and the turning of ἐπιστρέφω read as one road-image. ‘Bring back’ is acceptable in smooth registers and preserves the motion; ‘convert’ is excluded from reading tiers because modern English hears a change of religion and imports a technical category, though the Vulgate’s converterit is why the older English tradition has it. ‘Restore’ belongs to καταρτίζω (Gal 6:1), a distinct lexeme covering a comparable pastoral act, and using it here would erase James’s choice of a different verb.

The aorist is complexive: the turning taken as one accomplished act, not a process of persuasion.

Two indefinite pronouns, one for each party, and neither is qualified. This is the most easily lost feature of the verse.

James has just given two sets of instructions in which office and standing do mattered: the elders are summoned for the sick (v. 14), and it is the δίκαιος whose δέησις is powerful (v. 16). Here he specifies nothing. The wanderer is τις ἐν ὑμῖν; the one who goes after him is simply τις.

Consequences for rendering. Do not supply a subject for the second τις — ‘one of you,’ ‘another believer,’ ‘a brother’ all narrow what James left open. Do not convert the indefinite into a class (‘if someone in the church strays and a leader brings him back’). And note that ἐν ὑμῖν attaches to the first τις only: the wanderer is located inside the community, while the restorer’s membership is assumed rather than stated.

The scenario is deliberately unassigned. Anyone can wander; anyone can go after.

ἐάν + aorist subjunctive twice, under a single ἐάν, with καί coordinating the second verb. Third-class condition: the case is presented as a live possibility, neither asserted as fact (first class) nor as contrary to fact.

Two rules follow, both already fixed in the corpus for James’s staged illustrations (2:2, 14, 15, 17):

1. Do not render ‘when.’ That converts a hypothetical case into a report of what is actually happening in the congregation and settles a historical question by translation (§6).
2. Do not begin a second condition at καί. One ἐάν governs both subjunctives; English must keep them inside one protasis and must not close a sentence at the verse boundary. The apodosis is v. 20’s γινωσκέτω, and the verse division must not be allowed to break a single sentence into two.

The aorists are complexive: each event taken as a single whole rather than as a process. ‘If anyone should be drifting away’ imports a durative the aorist does not carry.

Proposed — pending reviewRichard Bauckham, James: Wisdom of James, Disciple of Jesus the Sage, New Testament Readings (London: Routledge, 1999)

The patristic reception is uniformly practical and uniformly focused on the rescuer’s standing rather than the wanderer’s.

The Latin tradition, following the Vulgate’s si quis ex vobis erraverit a veritate et converterit quis eum, reads the passage as the charge of fraternal correction, and it is regularly paired with Gal 6:1 (ὑμεῖς οἱ πνευματικοὶ καταρτίζετε τὸν τοιοῦτον) and Matt 18:15 as one body of teaching on how a community recovers its own. Bede, commenting on the Catholic Epistles, takes the passage as addressed to all the faithful rather than to teachers alone — which is a fair reading of the unqualified second τις.

The Greek catena tradition on James similarly stresses that James ends not with a doxology but with an assignment, and that the reward promised in v. 20 belongs to the one who turns another. That reading depends on taking σώσει ψυχὴν αὐτοῦ in v. 20 of the wanderer’s life rather than the rescuer’s — a question that belongs to the next verse but is already latent here in the two indefinites.

Worth recording: the ancient readers did not treat this verse as a test case for whether the wanderer had ever been a believer. That question is later, and reading it back into ἐάν τις ἐν ὑμῖν is anachronism (§9).

Proposed — pending reviewBede the Venerable, Commentary on the Seven Catholic Epistles, trans. David Hurst, Cistercian Studies 82 (Kalamazoo, MI: Cistercian Publications, 1985)

The text is stable. NA28 prints Ἀδελφοί μου, ἐάν τις ἐν ὑμῖν πλανηθῇ ἀπὸ τῆς ἀληθείας καὶ ἐπιστρέψῃ τις αὐτόν without a bracketed reading.

Minor variation worth recording rather than adopting: some witnesses omit μου after Ἀδελφοί, and some read ἐπιστρέψει (future indicative) for ἐπιστρέψῃ, an itacistic spelling with no semantic weight — η and ει had merged phonetically by this period, and the subjunctive is required by ἐάν. Neither variant affects the sense.

The verse-division after αὐτόν is editorial and modern. Since the apodosis (γινωσκέτω) stands in v. 20, no English rendering may close a sentence here; the comma in the printed text reflects that judgment correctly.