The church at Corinth was fracturing along party lines. Paul opens his letter by addressing reports of quarreling and factions forming around different leaders—himself, Apollos, and Cephas. He dismantles their misplaced loyalty by reminding them that Christ alone was crucified for them, and that God's wisdom looks like foolishness to the world. The cross, not eloquent philosophy or powerful rhetoric, stands at the center of the gospel message.
Paul's opening sentence (vv. 1-2) is a single, carefully constructed Greek period that establishes the theological architecture for everything that follows. The structure moves from sender to recipients to greeting, but each element is laden with qualifications that do far more than identify parties—they define relationships and assert authority. Paul identifies himself as 'called as an apostle,' using the adjective κλητός rather than a verbal form, which emphasizes his status as one who exists in a permanent state of having-been-called. The phrase 'through the will of God' (διὰ θελήματος θεοῦ) is not mere pious convention but a polemical assertion: Paul's apostleship derives from divine initiative, not human appointment or congregational approval. This will matter enormously when he confronts the Corinthians' tendency to align themselves with human leaders (1:12; 3:4-5). The inclusion of Sosthenes as 'our brother' (ὁ ἀδελφός) is intriguing—possibly the same Sosthenes beaten in Acts 18:17, now a believer and Paul's co-sender, though the letter's consistent first-person singular ('I,' not 'we') makes clear that Paul alone bears apostolic authority.
The description of the recipients in verse 2 is a masterpiece of theological density. Paul addresses 'the church of God which is at Corinth,' a genitive of possession that reminds a fractious congregation that they belong to God, not to themselves or their favored leaders. The participle 'those who have been sanctified' (ἡγιασμένοις) is perfect passive, indicating a completed divine action with ongoing results—their holiness is a settled fact, accomplished 'in Christ Jesus,' the sphere in which sanctification occurs. The apposition 'saints by calling' (κλητοῖς ἁγίοις) reinforces this: they are holy because they are called, not because they have achieved moral perfection. This is crucial pastoral strategy—Paul will shortly catalog their failures (sexual immorality, litigation, idolatry, disorder in worship), yet he begins by anchoring their identity in God's effectual call rather than their defective performance. The phrase 'with all who in every place call on the name of our Lord Jesus Christ' expands the address beyond Corinth to the universal church, reminding the Corinthians that their local disputes occur within a global community united by common confession and worship. The final phrase 'their Lord and ours' (αὐτῶν καὶ ἡμῶν) is grammatically ambiguous—does it refer to 'every place' or to 'the name'?—but the effect is clear: Jesus Christ is Lord of all believers everywhere, a shared allegiance that relativizes local loyalties.
The greeting in verse 3 follows the standard Pauline pattern—'grace and peace from God our Father and the Lord Jesus Christ'—but its placement here is anything but routine. Grace (χάρις) and peace (εἰρήνη) are not abstract virtues but concrete divine gifts, the twin blessings of the new covenant. The single preposition ἀπό ('from') governs both 'God our Father' and 'the Lord Jesus Christ,' suggesting a unified source of blessing and implicitly affirming Christ's deity—grace and peace flow from God and Christ as from a single fountain. The title 'Lord' (κύριος) is especially significant in a letter that will repeatedly address issues of lordship and authority: Who has the right to command? To whom do believers owe ultimate allegiance? By invoking Jesus as 'Lord' in the opening breath, Paul establishes the christological criterion by which all subsequent disputes will be adjudicated. The Corinthians' problem is not lack of spiritual gifts or theological knowledge (1:5-7) but failure to live under the lordship of Christ, who must be not merely confessed but obeyed.
Paul does not begin by scolding the Corinthians for their failures but by reminding them of their identity: they are called, sanctified, and made holy not by their own achievement but by God's sovereign grace in Christ. The apostle's strategy is profound—transformation begins not with exhortation to try harder but with recollection of who we already are in Christ.
Paul's description of the church as 'all who in every place call on the name of our Lord Jesus Christ' (v. 2) echoes a phrase with deep Old Testament roots. In Genesis 4:26, after the birth of Seth's son Enosh, 'then men began to call upon the name of Yahweh'—a cryptic statement that Jewish tradition understood as the beginning of public worship and the invocation of God's covenant name. Throughout the Old Testament, calling on Yahweh's name becomes the defining act of covenant relationship (Ps 105:1; Isa 12:4; Zeph 3:9). Most significantly, Joel 2:32 promises that 'everyone who calls on the name of Yahweh will be delivered,' a text Paul cites explicitly in Romans 10:13 and alludes to here.
What is startling is Paul's application of this Yahweh-language to Jesus Christ. To 'call on the name of the Lord Jesus Christ' is to do what Israel did with Yahweh—to invoke him in worship, to appeal to him for salvation, to acknowledge him as covenant Lord. This is not merely high Christology; it is the highest Christology, an implicit identification of Jesus with the God of Israel. The church is constituted not by ethnic descent or geographic proximity but by the shared act of calling upon Jesus' name, an act that simultaneously confesses his deity and enacts dependence upon his saving power. For a congregation tempted to divide over human leaders, Paul's opening salvo is a reminder: there is one Lord, and he alone deserves the allegiance they are fragmenting among mere mortals.
Paul's thanksgiving (vv. 4–9) is a single, elaborately constructed Greek sentence that cascades through multiple subordinate clauses, each adding layers of theological richness. The main verb is εὐχαριστῶ ('I give thanks'), and everything else unpacks the grounds and content of that gratitude. Paul thanks God 'always' (πάντοτε) and 'concerning you' (περὶ ὑμῶν), establishing the Corinthians as the object of his gratitude—a striking note given the problems he will soon address. The thanksgiving is grounded 'in the grace of God which was given you in Christ Jesus' (ἐπὶ τῇ χάριτι τοῦ θεοῦ τῇ δοθείσῃ ὑμῖν ἐν Χριστῷ Ἰησοῦ). The prepositional phrase 'in Christ Jesus' is programmatic for Paul: all divine blessing flows through union with Christ.
Verses 5–7 elaborate the content of this grace through a series of ὅτι ('that') and καθώς ('even as') clauses. The Corinthians were 'enriched in everything' (ἐν παντὶ ἐπλουτίσθητε), specifically 'in all speech and all knowledge' (ἐν παντὶ λόγῳ καὶ πάσῃ γνώσει). The repetition of πᾶς ('all, every') underscores the comprehensive nature of God's enrichment. This enrichment corresponds to the confirmation of 'the testimony of Christ' among them (v. 6), suggesting that their spiritual gifts authenticated the gospel message. The result (ὥστε, 'so that') is that they 'are not lacking in any gift' (μὴ ὑστερεῖσθαι ἐν μηδενὶ χαρίσματι). The double negative (μὴ...μηδενί) is emphatic: not lacking in not even one gift. Yet this abundance is oriented eschatologically—they are 'eagerly waiting for the revelation of our Lord Jesus Christ' (ἀπεκδεχομένους τὴν ἀποκάλυψιν τοῦ κυρίου ἡμῶν Ἰησοῦ Χριστοῦ). The present participle ἀπεκδεχομένους suggests ongoing, intense expectation.
Verses 8–9 shift from the Corinthians' present enrichment to God's future faithfulness. The relative pronoun ὅς ('who') refers back to 'our Lord Jesus Christ,' making Christ the subject of the verb βεβαιώσει ('will confirm'). Christ Himself will confirm them 'to the end' (ἕως τέλους), ensuring they are 'blameless in the day of our Lord Jesus Christ' (ἀνεγκλήτους ἐν τῇ ἡμέρᾳ τοῦ κυρίου ἡμῶν Ἰησοῦ Χριστοῦ). The adjective ἀνεγκλήτους ('blameless, without accusation') has forensic overtones, evoking the final judgment. Paul's confidence rests not on Corinthian performance but on divine faithfulness: 'God is faithful' (πιστὸς ὁ θεός). The adjective πιστός is emphatic by its fronted position. God's faithfulness is demonstrated in the fact that 'through whom you were called into fellowship with His Son' (δι' οὗ ἐκλήθητε εἰς κοινωνίαν τοῦ υἱοῦ αὐτοῦ). The aorist passive ἐκλήθητε ('you were called') points to God's initiating action; the preposition εἰς ('into') indicates the goal of that call—participation in the life of God's Son.
The rhetorical effect of this thanksgiving is to establish a theological foundation before addressing the Corinthians' failures. Paul does not begin with rebuke but with grace. He reminds them of what God has done and will do, creating a framework in which correction can be received not as condemnation but as a call back to their true identity. The structure moves from past grace (v. 4), through present enrichment (vv. 5–7), to future confirmation (vv. 8–9), tracing the full arc of salvation. The repetition of 'in Christ Jesus' and 'our Lord Jesus Christ' (five times in six verses) hammers home the Christocentric nature of all Christian experience. Everything the Corinthians have and hope for is bound up with union with Christ.
Paul's thanksgiving is not flattery but theology: he anchors the Corinthians' identity not in their performance but in God's grace, their present gifts not in personal achievement but in divine enrichment, and their future hope not in self-improvement but in God's faithfulness. Before correction comes reminder—you are who God has made you in Christ.
Paul opens this section with παρακαλῶ δέ, the 'now' (δέ) marking a transition from thanksgiving to exhortation. The verb παρακαλῶ governs the entire appeal and is qualified by the prepositional phrase διὰ τοῦ ὀνόματος—Paul appeals not by his own authority but through the name of the Lord Jesus Christ. This invocation of Christ's name is not mere formula but the ground of unity itself: the Corinthians share one Lord, one name into which they were baptized. The ἵνα clause that follows articulates the content of Paul's appeal in both positive and negative terms: 'that you all say the same thing' (τὸ αὐτὸ λέγητε πάντες) and 'that there be no divisions among you' (μὴ ᾖ ἐν ὑμῖν σχίσματα). The repetition of αὐτός (same) in verse 10—same speech, same mind, same judgment—hammers home the call to unity, though Paul will later nuance what this 'sameness' entails.
Verse 11 provides the evidentiary basis (γάρ) for Paul's appeal: 'it has been reported to me.' The passive ἐδηλώθη leaves the informants somewhat anonymous, though Paul immediately identifies them as 'Chloe's people' (ὑπὸ τῶν Χλόης). This detail is striking—Paul names his source, lending credibility to his information and perhaps protecting himself from charges of meddling based on rumor. The report concerns ἔριδες (quarrels), and verse 12 unpacks what these quarrels look like: each person is claiming allegiance to a particular leader. The fourfold repetition of ἐγώ... εἰμι creates a staccato effect, mimicking the competitive boasting of the Corinthians. The final claim, 'I am of Christ,' is ambiguous—is this a fourth faction claiming superiority by direct allegiance to Christ, or is it Paul's own corrective? Most likely it represents another Corinthian party, one that ironically uses Christ's name to establish its own sectarian identity.
Verse 13 unleashes three rapid-fire rhetorical questions, each expecting a negative answer. The first, μεμέρισται ὁ Χριστός, uses the perfect tense to devastating effect: has Christ been divided and does he remain in that divided state? The question is absurd on its face—Christ is one, indivisible—yet the Corinthians' behavior implies precisely this fragmentation. The next two questions shift to Paul himself: 'Paul was not crucified for you, was he?' (μὴ Παῦλος ἐσταυρώθη ὑπὲρ ὑμῶν) and 'Or were you baptized in the name of Paul?' (ἢ εἰς τὸ ὄνομα Παύλου ἐβαπτίσθητε). The μή particle expects a negative answer, and the ἤ (or) introduces an alternative that is equally unthinkable. Paul is dismantling any basis for personal allegiance: he neither died for them nor gave them his name in baptism. Only Christ did both, and therefore only Christ deserves their undivided loyalty.
Verses 14-16 form a parenthetical aside in which Paul thanks God that he baptized very few Corinthians—only Crispus, Gaius, and (he suddenly remembers) the household of Stephanas. The εὐχαριστῶ here is not mere politeness but genuine relief: Paul is grateful that his limited baptismal activity prevents anyone from claiming to have been baptized 'in Paul's name.' The ἵνα clause in verse 15 expresses purpose or result: 'so that no one would say you were baptized in my name.' The slight confusion in verse 16 ('beyond that, I do not know whether I baptized any other') adds a touch of authenticity—this is not a carefully crafted argument but a spontaneous recollection. Verse 17 then provides the theological rationale: 'Christ did not send me to baptize, but to evangelize' (οὐ γὰρ ἀπέστειλέν με Χριστὸς βαπτίζειν ἀλλὰ εὐαγγελίζεσθαι). The strong adversative ἀλλά contrasts baptizing with evangelizing, and the final clause introduces a theme that will dominate chapters 1-4: Paul's evangelism is 'not in cleverness of speech' (οὐκ ἐν σοφίᾳ λόγου) lest the cross be emptied of its power. The verb κενωθῇ (be made void) is ominous—human eloquence can actually evacuate the cross of its saving efficacy, a claim Paul will unpack in the verses that follow.
Unity in the church is not achieved by rallying around gifted leaders but by recognizing that only Christ was crucified for us—and that singular, unrepeatable act of atonement is the sole ground of our common life.
Verse 18 is the thesis statement of the entire Corinthian correspondence on wisdom. The construction Ὁ λόγος γάρ ὁ τοῦ σταυροῦ leads with the topic, fronted before the verb for emphasis: it is precisely this message -- the cross-message -- that the argument turns on. The two parallel datives τοῖς μέν ἀπολλυμένοις... τοῖς δὲ σῳζομένοις divide hearers into two and only two categories, and the present-tense participles describe each as a movement rather than a settled state. The cross is therefore not a neutral religious symbol whose significance varies with the audience's preferences; it is a divider, an objective reality that causes movement either toward perishing or toward salvation, and the only thing that distinguishes which way one moves is whether the κήρυγμα sounds like nonsense or like δύναμις θεοῦ. This binary structure will dominate the next two chapters.
Verse 19 grounds Paul's claim in Isaiah 29:14 LXX, with one significant alteration: where the LXX has κρύψω (I will hide) for the second verb, Paul writes ἀθετήσω (I will set aside, nullify, treat as nothing). The substitution is not careless. Isaiah's "hide" is part of the prophetic warning -- Yahweh will conceal wisdom from those who refuse to hear -- but Paul's "set aside" is stronger: God does not merely withhold understanding from the wise, he actively annuls the very category of human σοφία as a path to himself. The line of Isaiah 29 was originally directed at Jerusalem's leaders who were hatching political alliances behind God's back; Paul lifts it into a general principle and applies it to the Corinthian σοφοί whose factionalism is doing the same thing in a different idiom.
Verse 20 unleashes a salvo of three rhetorical questions, each beginning with ποῦ; -- where? where? where? The triad targets three figures of authority: the σοφός (Greek philosopher), the γραμματεύς (Jewish scribe), the συζητητής (debater of this age, possibly the rhetorical sophist). The questions echo Isaiah 33:18 LXX ("where is the scribe? where is the counter of weights?"), where Yahweh has just delivered Jerusalem from Sennacherib and the surveyors who came to assess the conquest are nowhere to be found. Paul appropriates the eschatological reversal: the wise of every culture -- pagan and Jewish, philosophical and legal -- have been emptied of their authority by a single divine act. The verb ἐμώρανεν (he made foolish) is causative and aorist: God did this; it is finished; the verdict has been rendered.
Verses 21-22 supply the διπλοῦν χρέος (the double indictment). On one side the world ἐν τῇ σοφίᾳ τοῦ θεοῦ -- by means of, or within the sphere of, God's wisdom -- did not come to know God διὰ τῆς σοφίας (through its own wisdom). The pun is intentional: God's wisdom is precisely what set the limit on what human wisdom could discover. On the other side, both major cultural blocs of the Corinthian world demand the wrong thing. Jews ask for σημεῖα (legitimating miracles in the manner of Sinai or the Exodus -- Mark 8:11-13 records this exact demand pressed on Jesus), and Greeks search for σοφίαν (the system that satisfies the philosophical mind). The cross satisfies neither: it offers no spectacle for the Jewish demand and no logical elegance for the Greek demand. It offers only a crucified Messiah.
Verses 23-24 form the doctrinal hinge. The ἡμεῖς δέ contrasts apostolic preaching with both Jewish demand and Greek demand: but we proclaim Christ crucified. The perfect passive participle ἐσταυρωμένον is striking -- not "Christ who was once crucified," but Christ-as-crucified, the cross fixed permanently into his identity as risen Lord (Paul will repeat the perfect in 2:2 and the wounded-but-living-Lamb of Revelation 5:6 carries the same theology). To Jews this is σκάνδαλον; to Gentiles μωρία. But to αὐτοῖς τοῖς κλητοῖς (the called ones) -- the third category beyond Jew and Gentile, beyond ethnic boundary, the people summoned by God's effective call -- this same Christ is θεοῦ δύναμιν καὶ θεοῦ σοφίαν. Christ does not merely have wisdom and power; he is them. The cross is therefore not a problem that wisdom must solve but the place where wisdom and power are revealed in their definitive form.
Verse 25 closes with two compact paradoxes constructed on neuter substantives: τὸ μωρὸν τοῦ θεοῦ ("the foolishness of God") and τὸ ἀσθενὲς τοῦ θεοῦ ("the weakness of God"). Both are theological impossibilities under any normal description of deity, and Paul knows it. The trick of the syntax is that he does not actually say God is foolish or weak; he speaks of "what is foolish about God" and "what is weak about God" -- the cross-shaped action that looks foolish or weak from the human side. This thing, whatever it is in the divine reality, is σοφώτερον (comparative) than men and ἰσχυρότερον (comparative) than men. The argument is now complete: God has chosen a means of salvation that operates on a different scale of measurement than human σοφία and δύναμις can register, and the only way to perceive what God is doing is to abandon the scales themselves -- which is exactly what Paul will demand of the Corinthian factions in the chapters that follow.
The cross is not a problem to be solved by wisdom; it is the act in which God redefines what wisdom is. Anyone still scoring God's work on a scale calibrated by human cleverness has not yet heard the gospel as gospel -- only as the embarrassment that the gospel openly admits itself to be.
Isaiah 29:14 LXX reads: וְאָבְדָה חָכְמַת חֲכָמָיו וּבִינַת נְבֹנָיו תִּסְתַּתָּר ("the wisdom of its wise men shall perish, and the discernment of its discerning ones shall hide itself"). Paul cites the LXX with one telling alteration: he replaces κρύψω with ἀθετήσω, sharpening "hide" into "annul." The Hebrew background is the failure of Hezekiah's counselors to perceive that Sennacherib's army would be defeated not by alliance with Egypt but by Yahweh's direct intervention; Paul extends the principle: every human σοφία that proposes to evaluate God's saving action is being annulled at the cross.
Behind v. 31 (still ahead in t5) and standing as the deep root of the whole passage is Jeremiah 9:23-24 LXX: "Let not the wise man boast in his wisdom, let not the strong man boast in his strength, let not the rich man boast in his riches, but let him who boasts boast in this: that he understands and knows me." Paul is rewriting the Corinthian boast structure (each faction boasting in its leader, its giftedness, its sophistication) along the lines Jeremiah laid down centuries earlier. The cross is the place where every other ground for boasting collapses, and Christ -- as wisdom, righteousness, sanctification, redemption -- becomes the only object the believer can rightly boast in.
"those who are perishing" for ἀπολλυμένοις -- preserves the present tense (a movement, not a settled fact). NIV's "those who are perishing" matches; some older translations reduced the participle to a static category ("them that perish"), losing the trajectory.
"the message preached" for τοῦ κηρύγματος -- LSB renders the genre, "preached message," rather than the more wooden "the preaching." The translation captures that κήρυγμα names both the act and the content of the herald's announcement.
"the called" for τοῖς κλητοῖς -- preserves the verbal-adjective force of κλητός, identifying believers by what God has done (effective summons) rather than by what they have done (decision, response).
"a stumbling block" for σκάνδαλον -- rather than "scandal" or "offense." The English idiom captures the original sense of the trap-trigger: not just an unpleasant idea but an obstacle that actually trips one up in the path.
Verse 26 opens with the imperative Βλέπετε ("look, consider, observe") and the noun τὴν κλῆσιν ὑμῶν, "your calling." Paul is asking the Corinthians to do something concrete: look around the room, count heads, take stock of who you actually are. The argument is not abstract but empirical -- the social composition of the Corinthian church itself constitutes Paul's evidence. The threefold negation that follows -- οὐ πολλοί σοφοί... οὐ πολλοί δυνατοί... οὐ πολλοί εὐγενεῖς -- is structured as an anaphora hammering home the same point on three socially distinct axes: intellectual (σοφοί, the educated), political (δυνατοί, the powerful), and aristocratic (εὐγενεῖς, the well-born). The qualifier κατὰ σάρκα ("according to the flesh") attaches to all three: not many among you who measure highly by the world's metrics. Paul does not say none -- the qualifier is "not many" -- but he is making the point that God has built this church on a deliberately unimpressive demographic.
Verses 27-28 deploy a triple-aorist refrain -- ἐξελέξατο ὁ θεός / ἐξελέξατο ὁ θεός / ἐξελέξατο ὁ θεός -- that turns the passage into a liturgical drumbeat. Each iteration introduces a new pair: God chose the foolish to shame the wise, the weak to shame the strong, the lowborn-and-despised to nullify what is. The escalation is intentional. By the third clause Paul has moved from antitheses still operating within the world's categories (foolish/wise, weak/strong) to a flatly metaphysical antithesis: τὰ μὴ ὄντα versus τὰ ὄντα, "the things that are not" versus "the things that are." God has chosen what does not even register as existing in the world's accounting in order to καταργήσῃ -- to render inoperative, to bring to nothing -- what does register. The ontology of grace is not the elevation of the lowly to high status but the dismantling of the entire status system.
The two ἵνα-clauses governing vv. 27-28 ("so that he may shame... so that he may nullify") and the ὅπως-clause of v. 29 ("so that no flesh may boast") form a layered structure of divine purpose. Each layer goes deeper: shame the wise, then nullify the things that are, then -- the deepest goal -- silence every boast in God's presence. The verb καυχάομαι ("to boast") is the master-term of the entire Corinthian crisis: each faction is boasting in its leader (Paul, Apollos, Cephas, Christ); each member is boasting in his gifts; the city itself was famous for boasting in its wealth and rhetorical sophistication. God's electing strategy aims at the destruction of boasting at its root, and the means is the cross. Anyone who has been chosen from among τὰ μὴ ὄντα cannot construct a boast on the basis of being chosen; the act of election dismantles the very platform from which boasting could begin.
Verse 30 shifts the argument's direction. Up to this point Paul has been describing what God has done to the world's wisdom and what he has chosen from the world's nothings. Now he says where the Corinthians themselves stand: ἐξ αὐτοῦ δὲ ὑμεῖς ἐστε ἐν Χριστῷ Ἰησοῦ, "out of him are you in Christ Jesus." The prepositional phrase ἐξ αὐτοῦ ("from him") names the source of their existence as believers -- not their own decision, not Paul's preaching, not their teacher's eloquence, but God himself. The relative clause that follows is one of the densest Christological summaries in Paul: ὃς ἐγενήθη σοφία ἡμῖν ἀπὸ θεοῦ -- Christ became wisdom for us from God. The aorist passive ἐγενήθη (a divine passive: God made it so) places Christ in the position of being the answer to the Corinthian wisdom-craving. They wanted σοφία; God gave them Christ; therefore Christ is their σοφία.
The three nouns appositional to σοφία -- δικαιοσύνη, ἁγιασμός, ἀπολύτρωσις -- are not coordinated as four parallel items but structured as one master-term (wisdom) explained by three sub-terms. God's wisdom-strategy at the cross took the concrete form of righteousness (the legal status conferred by the cross-event), sanctification (the ongoing transformation of those incorporated into Christ), and redemption (the liberating ransom paid in his blood). The three together unfold what wisdom does rather than what wisdom is; God's wisdom is recognized by its effect, namely a community of forgiven, transformed, liberated people. None of these three terms can be located in human achievement: each is the gift of being ἐν Χριστῷ Ἰησοῦ, and each is therefore unboastable.
Verse 31 closes the argument by quoting Jeremiah 9:24 LXX in compressed form: ὁ καυχώμενος ἐν κυρίῳ καυχάσθω, "the one boasting -- let him boast in the Lord." The full Jeremiah text contrasts boasting in wisdom, strength, and riches (the same triad Paul will not have failed to notice underlying his σοφοί / δυνατοί / εὐγενεῖς of v. 26) with boasting in knowing and understanding the Lord. Paul cuts to the punch line and applies it to the Corinthian factions: the only legitimate boasting is the boasting that names God himself as its object -- and since God's wisdom-act has located itself in the crucified Christ, the only legitimate boasting is in the cross. The argument has come full circle. Paul opened with the word of the cross as foolishness; he closes with the word of the cross as the only ground on which a believer may stand to make any claim at all.
God's electing love does not reach into the world to elevate its prize specimens; it reaches into the world to expose how small the world's own metrics are. The believer's boast is therefore not in being chosen but in the One whose choosing dismantles every reason for boasting except himself.
Jeremiah 9:23-24 LXX (MT 9:22-23) reads: אַל־יִתְהַלֵּל חָכָם בְּחָכְמָתוֹ וְאַל־יִתְהַלֵּל הַגִּבּוֹר בִּגְבוּרָתוֹ אַל־יִתְהַלֵּל עָשִׁיר בְּעָשְׁרוֹ׃ כִּי אִם־בְּזֹאת יִתְהַלֵּל הַמִּתְהַלֵּל הַשְׂכֵּל וְיָדֹעַ אוֹתִי ("Let not the wise boast in his wisdom, let not the strong boast in his strength, let not the rich boast in his riches; but let the boaster boast in this: that he understands and knows me"). Paul has compressed the citation but preserved its theological structure: Jeremiah's threefold prohibition (wisdom, strength, riches) is mirrored exactly in Paul's threefold negation of v. 26 (σοφοί, δυνατοί, εὐγενεῖς). The Corinthian boast pattern is being diagnosed as the same pathology Jeremiah exposed in pre-exilic Jerusalem: trust in human resources rather than in covenant knowledge of Yahweh.
Hannah's prayer in 1 Samuel 2:1-10 is the OT background music for the entire passage. Hannah's God lifts the poor from the dust, raises the needy from the ash heap, sets them with princes (vv. 7-8); the bow of the mighty is broken; those who are full hire themselves out for bread; the barren bears seven. Paul's "things that are not, that he might nullify the things that are" is Hannah's reversal-theology in apocalyptic vocabulary. The Magnificat (Luke 1:46-55) draws on the same Hannah-tradition; Paul writes within the same matrix and now applies the reversal pattern not just to individuals but to the whole shape of God's saving strategy in Christ.
"according to the flesh" for κατὰ σάρκα -- preserved literally rather than smoothed to "humanly speaking" or "by worldly standards." LSB consistently keeps σάρξ visible because the term carries a theological weight (the human person under the conditions of fallenness) that loose paraphrase loses.
"the lowly things" for τὰ ἀγενῆ -- a careful rendering of the alpha-privative of γένος. NIV gives "the lowly things" too; older translations sometimes flatten to "base things," which in modern English carries an unintended connotation of immorality rather than low birth.
"by His doing" for ἐξ αὐτοῦ -- literally "out of him." LSB captures the source-of-existence force of the prepositional phrase rather than treating it as a mere causal "because of him." The phrase locates the believer's "in Christ" status as proceeding directly from God's own act.
"so that no flesh may boast" for ὅπως μὴ καυχήσηται πᾶσα σάρξ -- preserves the Hebraic idiom (πᾶσα + negative = "no") and keeps σάρξ rather than substituting "human being." The rhetorical force depends on the connection between σαρκικοί (3:1) and the σάρξ that is forbidden to boast.
"He who boasts, let him boast in the Lord" for ὁ καυχώμενος ἐν κυρίῳ καυχάσθω -- LSB preserves the imperative force of the third-person aorist imperative καυχάσθω. The clause is not advice but command: those who boast are commanded to direct the boast to its only legitimate object.