Verses 1-4: The Coming of the Holy Spirit. The chapter opens with the disciples gathered in unity on Pentecost, when the Holy Spirit arrives with visible and audible signs, filling them and enabling them to speak in other tongues.
Verses 5-13: The Multilingual Miracle and Public Reaction. Devout Jews from many nations witness the apostles speaking in their native languages, causing amazement, confusion, and some mockery.
Verses 14-21: Peter’s Explanation and Prophetic Fulfillment. Peter addresses the crowd, refuting accusations of drunkenness, citing the prophet Joel to explain the outpouring of the Spirit as a sign of the last days.
Verses 22-36: Peter’s Sermon on Jesus Christ. Peter proclaims Jesus as the Messiah, attested by miracles, crucified by wicked hands, raised by God, and exalted to the right hand of God, urging Israel to recognize Him as Lord and Christ.
Verses 37-41: The Call to Repentance and Baptism. Convicted by Peter’s message, the listeners ask what to do; Peter commands repentance and baptism in Jesus’ name for the remission of sins and receiving the Holy Spirit, resulting in about three thousand conversions.
Verses 42-47: The Fellowship of the Believers. The chapter closes describing the early Church’s devotion to apostolic teaching, fellowship, breaking of bread, prayer, communal living, and growth through God’s blessing.