The promise becomes reality. On the day of Pentecost, the Holy Spirit descends upon the gathered believers with the sound of rushing wind and tongues of fire, empowering them to proclaim the gospel in multiple languages. Peter delivers a bold sermon explaining that Jesus—crucified and risen—is both Lord and Messiah, leading three thousand people to repentance and baptism. The church is born as this new community devotes itself to the apostles' teaching, fellowship, breaking of bread, and prayer.
Luke opens with the articular infinitive ἐν τῷ συμπληροῦσθαι (en tō symplērousthai, "while the day was being fulfilled"). The present passive-deponent form portrays the day of Pentecost not merely as arriving on the calendar but as being filled up—the same verb Luke used in 9:51 of the days of Jesus' assumption. Pentecost is filled in the way prophecy is filled. The Feast of Weeks (Shavuot, Lev 23:15-16) falls fifty days after Passover, and by the first century rabbinic tradition associated it with the giving of Torah at Sinai (later codified at b. Pesachim 68b). Luke's readership would have heard the Sinai resonance: at Passover the Lamb was slain, and fifty days later the covenant was inscribed. Now at Passover the true Lamb has been slain, and fifty days later the new covenant is inscribed not on tablets but on hearts (Jer 31:33; cf. 2 Cor 3:3).
The phenomena that descend in vv. 2-3 are deliberately Sinai-shaped. ἦχος ὥσπερ φερομένης πνοῆς βιαίας ("a noise like a violent rushing wind") echoes Exod 19:16-19 LXX, where the mountain quaked and a great trumpet blast filled the camp. πνοή (pnoē, breath/wind) is the same root Genesis 2:7 LXX uses when God breathes life into Adam (πνοὴν ζωῆς); the new humanity now receives the breath of resurrection life. The γλῶσσαι ὡσεὶ πυρός ("tongues as of fire") evoke both Sinai's pillar of fire (Exod 13:21; Deut 4:11-12, where the mountain "burned with fire to the heart of heaven") and Isaiah's prophetic-cleansing coal (Isa 6:6-7). Where Sinai's fire stayed at the mountain's summit, this fire divides (διαμεριζόμεναι, present passive participle) and rests on each disciple individually—the corporate covenant becomes personally indwelt.
The ἑτέραις γλώσσαις ("other tongues") of v. 4 is the structural inverse of Babel. At Babel God confused language (συγχέωμεν, Gen 11:7 LXX) so that humanity could not understand one another; here the Spirit gives multiple tongues so that each pilgrim hears in his own διάλεκτος (dialektos, native dialect, v. 6). Babel scattered the nations from one tongue; Pentecost gathers the nations into one Lord through many tongues. The miracle is not glossolalic ecstasy of unintelligible speech but precise xenolalic intelligibility—Luke twice insists they hear "in our own dialect" (vv. 6, 8), and the catalogue of nations confirms it.
That catalogue (vv. 9-11) is geographically ordered, sweeping from the eastern empire (Parthians, Medes, Elamites, Mesopotamia) through the Levant and Asia Minor (Judea, Cappadocia, Pontus, Asia, Phrygia, Pamphylia) to Egypt and Libya, then reaching to Rome itself, with Cretans and Arabs as bookends from sea and desert. The list is not random ethnography; it sketches the Isa 11:11-12 vocabulary of eschatological diaspora-return: "Yahweh will recover the remnant of His people from Assyria, from Egypt, from Pathros, from Cush, from Elam, from Shinar, from Hamath, and from the islands of the sea." The nations the Spirit addresses are precisely the nations from which Israel was to be regathered. The Pentecost crowd is the firstfruits of that regathering, and the universal mission of Acts (1:8) is announced in advance in their hearing.
The content of the Spirit-given speech is named in v. 11: τὰ μεγαλεῖα τοῦ θεοῦ ("the mighty deeds of God"). The phrase is septuagintal praise-vocabulary—Deut 11:2 LXX uses it of the Exodus signs, Ps 70:19 LXX (71:19 MT) of God's redeeming acts, and Luke himself put it in Mary's mouth at 1:49 (ἐποίησέν μοι μεγάλα ὁ δυνατός). The Spirit does not inspire novelty; the Spirit inspires the recital of God's saving history, now climaxed in the resurrection that Peter is about to preach. The crowd's reaction divides along this seam: some are ἐξίσταντο ("amazed," v. 7) and διηπόρουν ("perplexed," v. 12), but others mock with γλεύκους μεμεστωμένοι εἰσίν ("they are full of sweet wine," v. 13). The mockery is the comic-ironic foil that opens Peter's sermon: they are indeed filled, but with the Spirit Joel promised, not with new wine.
Sinai gave the Law on tablets fifty days after the Passover lamb was slain; Pentecost gives the Spirit on hearts fifty days after the true Lamb was slain. Babel's confusion of tongues is undone not by erasing the languages but by sending the gospel through every one of them.
Peter's sermon is the longest in Acts and the structural template for the apostolic kerygma (cf. 3:12-26; 10:34-43; 13:16-41). It moves in four logically-marked sections, each anchored by a scriptural citation: (1) the present phenomenon explained by Joel (vv. 14-21), (2) Jesus' attested ministry, death, and resurrection (vv. 22-24), (3) David's prophetic witness from Ps 16 to a non-decaying Holy One (vv. 25-32), and (4) David's prophetic witness from Ps 110 to a Lord-at-God's-right-hand whose Spirit-outpouring is now visibly demonstrated (vv. 33-35), culminating in the verdict-summons of v. 36.
The Joel citation (vv. 17-21) is a fully-developed targum, not a wooden quotation. Peter alters Joel's μετὰ ταῦτα ("after these things") to ἐν ταῖς ἐσχάταις ἡμέραις ("in the last days"), inserts λέγει ὁ θεός ("God says") to mark divine speech, doubles "and they shall prophesy" at the end of v. 18 (extending the prophecy beyond Joel's own text), and adds ἄνω / κάτω ("above" / "below") and σημεῖα ("signs") at v. 19 to make the cosmic phenomena bipartite. These targumic adjustments are not free paraphrase; they tighten Joel's grammar to match the cross-and-resurrection-and-Pentecost sequence Peter has just witnessed and are an early window into how the apostles handled prophetic Scripture.
The argument from Ps 16 (vv. 25-31) operates on the basic principle that prophetic poetry written by David which cannot be true of David must be true of David's greater Son. The core verse is the LXX of Ps 15:10 (Heb 16:10): οὐκ ἐγκαταλείψεις τὴν ψυχήν μου εἰς ᾅδην, οὐδὲ δώσεις τὸν ὅσιόν σου ἰδεῖν διαφθοράν. The MT reads שַׁחַת (shachat, "pit"), which can mean either "the grave" generally or "decay/corruption" depending on derivation. The LXX chose διαφθορά ("decay"), and Peter's argument depends on that lexical decision: David's body did see decay (his tomb is here), but Jesus' body did not. The argument is impossible from the MT alone but is rigorous from the LXX, which is one reason early Christian exegesis so consistently defaulted to the Greek scriptures.
The argument from Ps 110:1 (vv. 34-35) is similarly premised on Davidic authorship: εἶπεν κύριος τῷ κυρίῳ μου ("Yahweh said to my Lord"). David, on the throne in Jerusalem, calls another figure "my Lord" and addresses Him with an oracle of enthronement at God's right hand. If David is the speaker, the addressee cannot be David; and if the addressee is enthroned at God's right hand, the addressee shares God's prerogatives. Peter's logic, like Jesus' use of the same psalm in Mark 12:35-37, presses the audience toward a christology in which Messiah is more than David's son. The same verse becomes the most-cited OT passage in the entire NT (over twenty allusions), the structural backbone of the Letter to the Hebrews, and the primary lexical source for the church's confession of Christ's session.
Verses 22-23 form the sermon's accusation, but its structure is carefully balanced: God acted (ἀποδεδειγμένον, ὡρισμένῃ βουλῇ, προγνώσει) and the audience acted (προσπήξαντες, ἀνείλατε). Peter does not absolve his hearers by appeal to predetermination, nor does he indict God by appeal to human guilt. Both are asserted with equal force, and the later Acts pattern (4:27-28; 13:27-29) confirms this is settled apostolic doctrine. The pastoral effect is to produce both conviction (v. 37, "they were pierced to the heart") and hope (v. 39, "the promise is for you"). If God has already woven their guilt into His redemptive purpose, then their guilt is precisely the path along which mercy can reach them.
The peroration in v. 36 lands with juridical weight. ἀσφαλῶς οὖν γινωσκέτω is courtroom diction, and the imperative reaches "all the house of Israel"—the same scope as Joel's prophecy. The two predicates—Lord and Christ—chiastically gather the sermon's two halves: Lord answers Ps 110, Christ answers Ps 16; or in the order of v. 36, Lord (Joel's κύριος, vv. 21, 34) and Christ (Davidic Messiah, vv. 25-31). The final clause—τοῦτον τὸν Ἰησοῦν ὃν ὑμεῖς ἐσταυρώσατε ("this Jesus whom you crucified")—is the rhetorical hammer-blow: the One God has enthroned is the One they crucified. Pentecost is therefore not only fulfillment but indictment, and the same Spirit who now proclaims is the Spirit who will, in v. 37, pierce.
The first apostolic sermon is a sustained argument that the κύριος upon whom Joel says we must call is the κύριος Jesus. Peter does not move from "Jesus is exalted" to "therefore Jesus is divine"—he moves from "Yahweh has been exalted, as Joel and David foretold" to "and that Yahweh is Jesus." The Pentecost crowd is summoned to a confession the Spirit Himself has just publicly underwritten.
Joel's oracle is the structural anchor of the sermon's first third. Hebrew of 2:28: וְהָיָה אַחֲרֵי-כֵן אֶשְׁפּוֹךְ אֶת-רוּחִי עַל-כָּל-בָּשָׂר ("And it shall be afterward, I will pour out My Spirit on all flesh"). The LSB rendering of v. 21 restores "Yahweh" where the Greek has κύριος, exposing that "the name of Yahweh" is what Peter will resolve in v. 36 onto Jesus. Ps 16:10 supplies the non-decay argument; the LXX's διαφθορά is the lexical hinge that makes the argument from David's tomb possible. Ps 110:1 supplies the enthronement argument: the LXX εἶπεν κύριος τῷ κυρίῳ μου (Yahweh said to my Lord) is, again with LSB's Yahweh-restoration, a conversation between God and a second figure whom David already calls "my Lord." 2 Sam 7:12-13 lies behind Peter's reference in v. 30 to "the oath" God swore to David about seating his descendant on the throne—Peter reads the Davidic covenant as fulfilled not in Solomon but in the resurrected and enthroned Christ.
"Yahweh" for κύριος in vv. 20, 21, and 34 — restoring the divine name in the OT citations is exactly the move the sermon's argument requires. If those verses read "the Lord," English readers may not perceive that Peter is identifying Jesus with the Yahweh of Joel and Ps 110. LSB makes the christological force of v. 36 visible.
"Slaves" for δούλους / δούλας in v. 18 (LSB: "even on My slaves, both men and women") — preserves the social-status shock of Joel's prophecy: the Spirit will be poured on the lowest of the lowest, not just the prophets and elders. "Bondservants" or "servants" softens this beyond what the Greek warrants.
"Predetermined plan" for ὡρισμένῃ βουλῇ in v. 23 — keeps the perfect passive participle's force ("having been marked off, fixed in advance") and renders βουλή with its deliberative weight (decision, counsel) rather than the weaker "purpose." The pairing with προγνώσει then gives the reader the full force of the divine sovereignty Peter is asserting.
"Did not undergo decay" for οὐδὲ ἡ σὰρξ αὐτοῦ εἶδεν διαφθοράν in v. 31 — preserves the LXX's lexical choice that Peter's argument depends on. "See corruption" (KJV) is more literal but archaic; "experience decay" (NIV) is acceptable but loses the see/saw verbal play. LSB threads the needle.
The narrative structure pivots on the crowd's anguished question in verse 37: 'What shall we do?' The aorist participle akousantes ('having heard') establishes causal connection—their piercing follows directly from Peter's proclamation. The verb katenygēsan is passive, indicating they were acted upon; conviction is not self-generated but Spirit-wrought. The compound verb intensifies the image: not merely pricked but pierced through. Luke's choice of kardian (heart) as the direct object underscores that this is not intellectual discomfort but existential crisis. The vocative andres adelphoi ('brothers, men') is striking—these are the same people who days earlier cried for Jesus' crucifixion, yet now they address the apostles as kin, implicitly acknowledging shared identity even as they seek escape from shared guilt.
Peter's response in verse 38 is structured as a two-part imperative followed by a promise. The aorist imperatives metanoēsate and baptisthētō demand immediate, decisive action. The shift from second person plural ('repent, you all') to third person singular imperative ('let each one be baptized') emphasizes both corporate and individual dimensions of response. The phrase epi tō onomati Iēsou Christou ('in the name of Jesus Christ') indicates the authority under which baptism occurs and the person to whom allegiance is pledged. The preposition eis with aphesin ('for/unto forgiveness') has sparked theological debate, but in context it denotes purpose or result—baptism is the visible expression of repentance that leads to forgiveness. The future indicative lēmpsesthe ('you will receive') promises what repentance and baptism do not earn but do receive: the gift of the Holy Spirit.
Verse 39 grounds the promise in covenant theology. The emphatic hymin gar ('for to you') places the immediate audience first, but the promise expands in concentric circles: 'your children' (covenant continuity), 'all who are far away' (geographic and ethnic expansion), and finally 'as many as the Lord our God will call' (divine sovereignty in election). The relative clause hosous an proskalesētai kyrios ho theos hēmōn employs the aorist middle subjunctive with an, indicating indefinite future action—God will continue to call, and the promise extends to all whom he calls. This is covenant inclusion without covenant abandonment; the promise to Israel now opens to embrace the nations.
Verses 40-41 summarize and report results. The imperfect verbs diemartyrato and parekalei indicate Peter's sustained testimony and exhortation—this was no brief altar call but extended proclamation. The aorist passive imperative sōthēte ('be saved') again emphasizes that salvation is something done to and for them, not by them. The phrase apo tēs geneas tēs skolias tautēs echoes Deuteronomy 32:5, positioning this generation at a covenant crossroads. Verse 41 reports the outcome with economical precision: those who 'welcomed' the word were baptized, and 'were added' that very day—about three thousand souls. The passive prosetethēsan subtly affirms divine agency in church growth. Luke's use of psychai (souls) rather than anthrōpoi (people) may echo Old Testament census language, suggesting the formation of a new covenant community.
Conviction without instruction leads only to despair; Peter's answer transforms anguish into action. The gospel does not leave us pierced and bleeding—it offers the surgery of repentance, the cleansing of baptism, and the gift of the Spirit.
Luke structures this summary with a series of imperfect verbs that paint a picture of continuous, habitual action: 'they were devoting themselves' (ēsan proskarterountes), 'fear was coming' (egineto phobos), 'they were sharing' (diemerizon). The imperfect tense throughout signals that this is not a snapshot of a single moment but a sustained pattern of life. The opening verb proskarterountes ('devoting themselves') governs four dative objects arranged in two pairs: 'the apostles' teaching and fellowship' / 'the breaking of bread and prayers.' The structure suggests these are not four isolated activities but an integrated rhythm—doctrine and community, sacrament and supplication forming the warp and woof of their common life.
Verses 44-45 introduce the economic dimension with a striking statement: 'all those who had believed were together and had all things in common' (pantes hoi pisteusantes ēsan epi to auto kai eichon hapanta koina). The phrase epi to auto ('together,' literally 'upon the same') appears three times in this passage (vv. 44, 47; also 1:15) and becomes a technical expression for the gathered assembly. The imperfect eichon ('they were having') with koina ('in common') does not necessarily mean they abolished private property immediately, but rather that they held their possessions with open hands, available for community need. The following verse clarifies: they 'were selling' (epipraskōn, imperfect again) property 'as anyone might have need' (kathoti an tis chreian eichen)—a conditional clause indicating responsive, need-based sharing rather than compulsory communalism.
The adverb homothymadon ('with one accord') in verse 46 is programmatic for Luke's ecclesiology. This is not mere organizational unity but a spiritual synchronization—they shared one passion, one direction, one heartbeat. Luke pairs their public worship ('day by day in the temple') with their private fellowship ('breaking bread from house to house'), showing the early church inhabited both Jewish sacred space and the intimate domain of the household. The phrase 'gladness and sincerity of heart' (agalliasis kai aphelotēs kardias) characterizes their meals with two qualities: exuberant joy and transparent simplicity. This is celebration without pretense, community without calculation.
The passage concludes with a divine passive: 'the Lord was adding to their number day by day those who were being saved' (ho kyrios prosetithei tous sōzomenous kath' hēmeran). The present participle sōzomenous ('those being saved') emphasizes the ongoing nature of salvation—these are people in the process of being delivered, brought into the sphere of God's saving action. The verb prosetithei ('was adding') makes clear that church growth is not the result of human technique or persuasive rhetoric but the Lord's own work. The community's attractive life—their teaching, fellowship, generosity, worship, and joy—creates the context, but God himself does the adding. Luke thus frames evangelistic fruitfulness as the overflow of authentic communal life rather than the product of programmatic effort.
The early church did not strategize for growth; they devoted themselves to Christ, and growth happened. Authentic community—marked by apostolic teaching, generous sharing, joyful worship, and transparent fellowship—becomes its own apologetic, and the Lord adds those he is saving.
The LSB renders proskarterountes as 'continually devoting themselves' in verse 42, capturing both the continuous aspect (imperfect periphrastic) and the intensity of the verb. Many translations opt for 'devoted themselves' (ESV, NASB95) or 'continued steadfastly' (NKJV), but the LSB's 'continually devoting' preserves the ongoing, habitual force of the Greek construction while maintaining readability. This choice underscores that the early church's pattern was not sporadic enthusiasm but sustained commitment.
In verse 44, the LSB translates epi to auto as 'together,' a functional equivalent that conveys the sense of corporate unity. The phrase literally means 'upon the same' and appears to have become a semi-technical term for the assembled community (see also 1:15; 2:47; 1 Cor 11:20; 14:23). While a woodenly literal rendering would be awkward in English, the LSB's 'together' captures the essential meaning of unified assembly. Some translations add interpretive glosses like 'in one place' (NIV) or 'meeting together' (NLT), but the LSB's simpler 'together' allows the context to define the nature of their unity.
The LSB's rendering of aphelotēs as 'sincerity' in verse 46 reflects the term's connotation of unpretentious genuineness. This rare word (appearing only here in the NT) could also be translated 'simplicity' (KJV, NKJV) or 'generosity' (NIV). The LSB opts for 'sincerity' to emphasize the transparent, guileless quality of their fellowship—they ate together without hidden agendas or social posturing. Paired with 'gladness' (agalliasis), the phrase paints a picture of joyful authenticity, celebration unmarred by duplicity.
In verse 47, the LSB translates the present participle tous sōzomenous as 'those who were being saved,' preserving the ongoing aspect of the Greek. This is not 'those who had been saved' (a perfect tense idea) or 'those who would be saved' (future), but people in the process of salvation. The LSB's choice maintains the dynamic, continuous nature of God's saving work—salvation is both event and process, and the Lord was daily bringing people into the sphere of his deliverance. This rendering resists the tendency to reduce salvation to a single moment and instead presents it as an ongoing reality into which God brings his people.