Introduction

Acts 2 records the birthday of the church. The Holy Spirit descends with wind and fire, enabling believers to proclaim God's mighty works in languages they've never learned. Peter stands to preach the first Christian sermon, explaining that this is the fulfillment of Joel's prophecy and that Jesus—crucified, risen, and exalted—is both Lord and Christ. Three thousand respond, and the new community immediately displays the marks of Spirit-filled life: devotion to teaching, fellowship, communion, and prayer.

The Coming of the Spirit (2:1-13)

When the day of Pentecost arrives, they are all together in one place. Suddenly a sound like a mighty rushing wind fills the house. Divided tongues as of fire appear and rest on each of them. They are all filled with the Holy Spirit and begin to speak in other tongues as the Spirit gives them utterance. Devout Jews from every nation under heaven are staying in Jerusalem. At this sound, the multitude gathers, bewildered because each hears them speaking in his own language. Amazed, they ask: "Are not all these who are speaking Galileans? How is it that we hear, each of us in his own native language?" They list Parthians, Medes, Elamites, and residents of Mesopotamia, Judea, Cappadocia, Pontus, Asia, Phrygia, Pamphylia, Egypt, Libya, Rome, Cretans, and Arabians—"we hear them telling in our own tongues the mighty works of God." All are amazed and perplexed: "What does this mean?" But others mock, saying they are filled with new wine.

• Pentecost: The Jewish harvest festival, fifty days after Passover. Jesus died at Passover; the Spirit comes at harvest.
• Together in One Place: Unity precedes the Spirit's coming. The church was gathered and praying.
• Wind and Fire: Old Testament symbols of God's presence. The Spirit's arrival is unmistakable.
• Other Tongues: Real languages they hadn't learned, not ecstatic speech. Communication, not confusion.
• Every Nation: The gospel immediately reaches people from across the known world. Pentecost reverses Babel.
• Mighty Works of God: The content was praise and proclamation, not private messages.
• Mixed Response: Some were amazed; others mocked. The Spirit's work always divides.

Peter's Sermon (2:14-36)

Peter stands with the eleven, raises his voice, and addresses the crowd. These men are not drunk—it's only 9 AM. This is what Joel prophesied: "In the last days, God says, I will pour out my Spirit on all flesh." Peter proclaims Jesus of Nazareth, a man attested by God through mighty works, signs, and wonders. He was delivered up according to God's plan and crucified by lawless men. But God raised Him, freeing Him from death because it was impossible for death to hold Him. Peter quotes David in Psalm 16 about not being abandoned to Hades or seeing corruption—David wasn't speaking of himself (he died and his tomb is with us) but prophetically of the Christ. This Jesus God raised up; they are all witnesses. Being exalted at God's right hand and receiving the promised Spirit, He has poured out what they see and hear. David didn't ascend to heaven, but he said, "The Lord said to my Lord, 'Sit at my right hand.'" "Let all Israel therefore know for certain that God has made him both Lord and Christ, this Jesus whom you crucified."

• Joel's Prophecy: "Last days" began with Jesus' coming. The Spirit's outpouring marks the new era.
• All Flesh: Sons, daughters, young, old, male, female servants—the Spirit is democratized.
• Jesus Attested: His miracles weren't random but divine attestation. God was with Him.
• Definite Plan: The crucifixion wasn't accident but God's determined purpose. Human guilt and divine sovereignty coexist.
• Death Couldn't Hold Him: Resurrection was inevitable because of who Jesus is. Death had no rightful claim.
• Psalm 16: David spoke prophetically of Christ's resurrection, not his own.
• Exalted to God's Right Hand: Jesus now reigns at the place of supreme authority.
• Lord and Christ: Peter's climactic declaration. Jesus is sovereign Lord and promised Messiah.

Response and New Community (2:37-47)

When they hear this, they are cut to the heart and ask Peter and the apostles, "Brothers, what shall we do?" Peter says, "Repent and be baptized every one of you in the name of Jesus Christ for the forgiveness of your sins, and you will receive the gift of the Holy Spirit. For the promise is for you and for your children and for all who are far off, everyone whom the Lord our God calls." With many other words he testifies and exhorts them, "Save yourselves from this crooked generation." Those who receive his word are baptized—about three thousand souls are added that day. They devote themselves to the apostles' teaching, fellowship, breaking of bread, and prayers. Awe comes upon every soul, and many signs and wonders are done through the apostles. All who believe are together and have all things in common; they sell possessions and belongings and distribute to any in need. Day by day they attend the temple together, break bread in their homes, receive their food with glad and generous hearts, praise God, and have favor with all the people. The Lord adds to their number day by day those who are being saved.

• Cut to the Heart: The Spirit convicts through the preached word. Genuine response to truth.
• "What Shall We Do?": The proper question when confronted with the gospel.
• Repent and Be Baptized: Turning from sin and identifying publicly with Jesus. Both are expected.
• Gift of the Holy Spirit: The Spirit is promised to all who respond—not just the apostles.
• Three Thousand: Massive response. The church explodes from 120 to over 3,000 in one day.
• Four Devotions: Teaching, fellowship, breaking bread, prayers—the marks of healthy church life.
• All Things in Common: Radical generosity addressed needs. This was voluntary, not compulsory.
• Glad and Generous: Joy characterized their community. Generosity flowed from gladness.
• Lord Adds Daily: Growth was God's work. They lived attractively; He drew people in.

Key Takeaways

• The Spirit Empowers Witness: The tongues weren't for private benefit but public proclamation of God's works.
• Jesus Is Lord and Christ: Peter's sermon centers on Jesus' death, resurrection, and exaltation. This remains the gospel.
• The Church Is a Community: From day one, believers gathered, learned, shared, prayed, and grew together.

Reflection Questions

• The Spirit came upon a praying, unified community. How might your community prepare for fresh encounters with the Spirit?
• The first believers devoted themselves to teaching, fellowship, breaking bread, and prayer. Which of these is strongest in your life? Weakest?
• They had "all things in common" and met needs generously. How radical is your generosity toward fellow believers?