One clause, and every word in it is doing structural work. James has just finished with the double-souled man who is ἀκατάστατος ἐν πάσαις ταῖς ὁδοῖς αὐτοῦ (v. 8) — unstable in all his ways. Now, with a mild δέ, he turns to a different instability: the reversal of social position under God’s reckoning.

Three decisions carry the verse.

1. καυχάσθω is a command to boast. James uses the verb Paul uses, and uses it the way Jer 9:23 LXX licenses: not by suppressing boasting but by relocating its object. This is the only imperative in the sentence, and it governs v. 10 as well.
2. ταπεινός is a status word, not a virtue word. The corpus glossary already fixes the ταπειν- family in the status-lowering sense (Isa 53:8; Luke 1:52; 1 Pet 5:5), and the answering πλούσιος in v. 10 puts the matter beyond doubt: this is about economic position in the assembly, an issue James returns to at 2:1-7 and 5:1-6.
3. ὕψος is a plain spatial noun — height — and James does not say what the height consists in. The reader is left to infer it, and readers have inferred differently ever since.

The verse is also the first half of a construction whose second half is genuinely contested: whether ὁ πλούσιος in v. 10 is a brother too, and whether the elided καυχάσθω carries over to him ironically or straight. That question is settled in v. 10, not here, but the way v. 9 is rendered constrains it — which is why the apparatus below keeps the terse Greek terse rather than filling it out.

Proposed — pending reviewPeter H. Davids, The Epistle of James: A Commentary on the Greek Text, New International Greek Testament Commentary (Grand Rapids: Eerdmans, 1982)

The corpus glossary already fixes καυχάομαι as ‘boast,’ with the note that the verb is ordinarily pejorative in Greek but is legitimized in biblical usage by a change of object, on the model of Jer 9:22-23 LXX (cited at 1 Cor 1:31; 2 Cor 10:17). That decision governs here without modification.

What is distinctive at Jas 1:9 is the imperative. Paul redirects boasting; James commands it. The nearest formal parallel is the LXX source text itself — ἐν τούτῳ καυχάσθω ὁ καυχώμενος (Jer 9:23 LXX), also a third-person present imperative of this verb. James is not merely echoing the theme; he is reproducing the grammatical shape of the oracle.

Renderings to be excluded: ‘take pride in’ (modern psychological register, and it privatizes what is a public act in the ancient honor economy), ‘rejoice in’ (that is χαίρω, and James has just used χαρά at v. 2 — the distinction must survive), and ‘glory in’ except in declared liturgical register, where English usage has fixed it.

The present aspect is durative: a settled practice of boasting, not a single utterance.

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ταπεινός in Hellenistic Greek names position, not temperament: low-lying ground, low birth, low economic standing, and derivatively the person of no account. The LXX uses it for the ‘ānî / dal — the poor and the oppressed, whose lowness is a circumstance done to them (Ps 17:28 LXX; Prov 3:34; Isa 53:8; Luke 1:52 ταπεινούς over against δυνάστας).

The corpus glossary fixes the whole ταπειν- family on one English root and specifies that ταπεινός substantival names social position and standing rather than an interior attitude. That entry, made at 1 Pet 5:5, applies here without change, and the immediate context confirms it decisively: the answering member in v. 10 is ὁ πλούσιος, the rich man. An economic antonym fixes an economic term.

So ‘humble’ is excluded from the reading text. In modern English ‘the humble brother’ names a man of modest temperament, and the verse then reads as counsel about attitude — which reverses James’s point and severs the link to 2:1-7 and 5:1-6, where the poor/rich division in the assembly is the explicit subject. ‘Lowly’ is retained: it carries the status sense and shares an English root with the ταπείνωσις of v. 10, which is essential, since the two verses are one sentence built on that root-play.

Built onbdag · muraoka-lxx

Proposed — pending reviewLuke Timothy Johnson, The Letter of James, Anchor Bible 37A (New York: Doubleday, 1995)

ὕψος is a plain spatial noun — height, elevation, the top of something. In the LXX it renders mārôm and gōbah and is used both literally (the height of a wall, 3 Kgdms 6:2) and of exalted status (Job 5:11 LXX, where God sets the ταπεινούς εἰς ὕψος — the exact pairing of this verse).

James does not say what the height is. He asserts elevation and stops. Every English rendering that specifies — ‘high position,’ ‘exalted state,’ ‘the high place God has given him,’ ‘his new dignity in Christ’ — supplies content the Greek withholds.

The possessive αὐτοῦ is the sharp edge of the clause: the height is his, predicated of the same man just called lowly. James does not say the lowly brother boasts in God’s height, or in a height promised to him. He is told to boast in a height he has.

Built onbdag · muraoka-lxx

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)

Article–noun–article–adjective is the second attributive position. It is not the compressed ὁ ταπεινὸς ἀδελφός but the fuller construction, in which the modifier is added as a separate, mildly emphatic unit — ‘the brother, the lowly one.’ Standard Koine (BDF §270), and the extra weight on the adjective should be noted rather than overtranslated: an English relative clause (‘the brother who is lowly’) reproduces the effect adequately in the smooth tier, while the literal tier keeps the doubled article visible.

On ἀδελφός: the corpus policy renders the masculine as written and footnotes a mixed referent rather than expanding to ‘brother and sister’ in the main text. Here the noun is singular and generic within a community James addresses as ἀδελφοί μου (1:2, 16, 19; 2:1). Per §3, the grammatical gender stands in the rendering and the inclusive scope is recorded here.

The presence of ἀδελφός is itself a datum for v. 10. James says of the lowly man that he is a brother, and says nothing of the kind about ὁ πλούσιος. Whether that silence is significant is the crux of the next verse; it must not be pre-empted by supplying ‘brother’ there or by suppressing its force here.

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ἐν with καυχάομαι marks the sphere or ground of the boasting, not its instrument or its cause. The corpus glossary already fixes this at Gal 6:14: retain ‘in’; ‘because of’ tips causal and ‘by’ tips instrumental, and both narrow what the preposition leaves broad.

The construction is the one Jeremiah’s oracle uses — ἐν τούτῳ καυχάσθω ὁ καυχώμενος (Jer 9:23 LXX) — and which Paul takes over verbatim (1 Cor 1:31; 2 Cor 10:17). Its function in every case is to name the object in which the boast rests. James’s contribution is to make the object a paradox: a lowly man’s height.

Built onbdag · muraoka-lxx

Per §10, epistolary and paraenetic connectives are always rendered. δέ here is transitional rather than strongly adversative: James is moving to a new topic, not contradicting v. 8. ‘Now’ or a mild ‘and’ carries it; ‘but’ is defensible if the contrast with the ἀνὴρ δίψυχος is felt, and the smooth tier keeps ‘but’ because the reversal-theme does set this paragraph against what precedes.

What is not permitted is dropping the particle. The δέ is what tells the reader that vv. 9-11 are a new movement within an unbroken paraenetic chain rather than a fresh start — a distinction editorial paragraphing cannot make and should not be allowed to obscure.

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The verse is textually stable. NA28 prints Καυχάσθω δὲ ὁ ἀδελφὸς ὁ ταπεινὸς ἐν τῷ ὕψει αὐτοῦ with no variation unit, and the verse is not treated in Metzger’s commentary. The major uncials (א A B C P) agree.

The only matter worth recording is editorial rather than textual: punctuation. NA28 closes v. 9 with a comma, joining it to v. 10 as one sentence with a single governing imperative and an elided verb in the second member. That decision — which is a modern editorial judgment, since the majuscules are unpunctuated — is what makes the ὁ πλούσιος of v. 10 depend on καυχάσθω. Any rendering that ends v. 9 with a full stop has quietly resolved the v. 10 crux. The comma is retained here.

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Behind the verse stands Jer 9:22-23 LXX (MT 9:23-24):

μὴ καυχάσθω ὁ σοφὸς ἐν τῇ σοφίᾳ αὐτοῦ … ἀλλʼ ἢ ἐν τούτῳ καυχάσθω ὁ καυχώμενος

The shared features are not incidental: the third-person present imperative of καυχάομαι, the ἐν + dative naming the object, the possessive αὐτοῦ, and a list contrasting worldly standing with the one legitimate ground of boasting. Jeremiah’s list is wise/strong/rich; James’s is lowly/rich. The rich man appears in both.

The MT underlying the oracle has YHWH as the object of the true boast (‘that he understands and knows me, that I am YHWH’). Per §1 the Greek is rendered as written and the Hebrew substrate is footnoted rather than imported — but the substrate matters exegetically here, because it shows that the biblical pattern of legitimized boasting always relocates the object outside the boaster. James’s ἐν τῷ ὕψει αὐτοῦ appears to keep the object attached to the boaster, which is precisely what makes the clause arresting and what the two readings under ὕψος are trying to account for.

The reversal-motif itself is standard prophetic and psalmic material: Job 5:11 LXX (τὸν ποιοῦντα ταπεινοὺς εἰς ὕψος), 1 Kgdms 2:7-8, Ps 112:7-8 LXX, and — in the closest NT form — Luke 1:52.

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Per §10, genre is tagged before rendering. James 1 is paraenesis with strong wisdom-literature colouring: chains of imperatives, aphoristic compression, sapiential imagery (the wave, the flower, the mirror). The register is neither epistolary argument nor poetry, and the English should not be smoothed toward either.

Practically this means the terseness stays. James writes eleven words and supplies no explanation of the height; the rendering supplies none either. It also means the third-person imperative is kept as a third-person imperative — ‘let the brother … boast’ — rather than converted to a second-person exhortation, per the standing corpus policy on third-person imperatives (Phil 4:5-6; 1 Pet 4:16). James shifts between second plural (ἡγήσασθε, v. 2) and third singular (αἰτείτω, v. 5; καυχάσθω, v. 9) deliberately, and the alternation is discourse structure.

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Proposed — pending reviewMartin Dibelius, James, rev. Heinrich Greeven, trans. Michael A. Williams, Hermeneia (Philadelphia: Fortress, 1976)

The verse drew little sustained patristic comment; James was received slowly in the West and the surviving Greek catena material on it is thin. Two observations can be made safely.

First, the reading of ὕψος as eschatological exaltation is early and widespread in the Greek tradition, which naturally read James through the reversal-sayings of the Gospels (Matt 23:12; Luke 14:11; 18:14 — all built on ταπεινόω/ὑψόω, the pair the corpus glossary already treats as one pattern).

Second, the Latin tradition’s exaltatione sua for ἐν τῷ ὕψει αὐτοῦ is a legitimate but slightly resolving rendering: exaltatio is an act-noun and tips toward the process of being raised, where ὕψος is a state-noun naming the elevation itself. This is reception, not evidence (§11), and the plain ‘height’ is retained.