What is the significance of the church's beginning in Acts?

The beginning of the church in Acts marks the fulfillment of Christ's commission and the establishment of a divine assembly of believers, characterized as the body of Christ. This moment is initiated with the outpouring of the Holy Spirit on Pentecost, which empowers the apostles to preach the gospel beyond the Jewish community to Gentiles (Acts 2:39, Matthew 28:19). The growth of the church demonstrates God's sovereign grace, as it expands to include individuals from all nations. The church's formation signifies not only a historical event but the realization of God’s eternal purpose in redemptive history, reflecting His desire that all people come to know His son. The church represents a cosmic body unified under Christ, fulfilling the promise of salvation.