Acts 2: Pentecost and Peter's sermon

Acts 2 contains the most consequential sermon in church history — Peter's. Three thousand converted in one preaching. The pattern set there still shapes the church.

Historical context

Pentecost was the Jewish festival 50 days after Passover. Jerusalem was full of Diaspora Jews. The Spirit's descent (vv. 1-4), the multi-lingual sign (5-13), Peter's sermon (14-36), the response and 3,000 converted (37-41), and the early community life (42-47) — five movements in one chapter that established Christianity's shape.

Three sermon arc options

• Peter's sermon, beat by beat. Acts 2:14-41. Walk through Peter's sermon structure: the Joel quotation (16-21), the David Christological argument (22-36), the call to repent (38). Peter models gospel proclamation for every preacher who came after.
• Five marks of the early church. 2:42-47. Apostles' teaching, fellowship, breaking bread, prayers, sharing of possessions, awe, gladness, daily increase. Walk through each. Apply: which marks does your church have?
• The Spirit promised, the Spirit given. Pentecost as the inauguration of the Spirit's age. Joel 2:28-32 (cited in vv. 17-21) is now happening. The Spirit poured out on all flesh — old, young, men, women, slaves. Pentecost is the great democratization.

Original language notes

Glōssais ("tongues/languages," vv. 4, 11) — the same word for both. At Pentecost the tongues are real languages — Diaspora Jews hear in their native tongue. Apostolōn didachē ("apostles' teaching," v. 42) — foundational. The early church didn't separate teaching from communal life.

Five illustration hooks

• A divided humanity (Babel) reversed. Acts 2 is the un-Babel.
• A first sermon outline by Peter — Old Testament fulfillment, Christological argument, ethical call. The shape every Christian sermon since.
• 3,000 converted in one day — by a single sermon. The Spirit is the variable, not the technique.
• A community where "no one had any need" (2:45) — Christianity's first social experiment, embedded in worship.
• The Spirit poured on "all flesh" — old, young, male, female, slave. Joel's prophecy democratizing prophecy.

Cross-references

• Joel 2:28-32 — The prophecy Peter quotes.
• Genesis 11:1-9 — Babel — what Pentecost reverses.
• 1 Corinthians 12:13 — "In one Spirit we were all baptized into one body."
• Acts 10:44-48 — A second Pentecost for the Gentiles.

Pastoral application

Don't treat Pentecost as a one-time event. The Spirit's outpouring is the church's ongoing pattern. The marks of the early church (vv. 42-47) are the test of every church's health.