The Book of Acts records the beginning and growth of the church. It shows how the gospel was preached, how people responded, and how congregations were established.
This study highlights:
- The church beginning in Jerusalem (Acts 2)
- The apostles preaching the gospel (Acts 4:12)
- Examples of conversion (Acts 8, 9, 10, 16)
- Baptism for the remission of sins (Acts 2:38; 22:16)
- Congregational autonomy (Acts 14:23)
- The spread of the gospel to all nations (Acts 1:8)
Acts provides the clearest picture of how people became Christians and how the church functioned in the first century.
The Book of Acts records the beginning and growth of the church. It shows how the gospel was preached, how people responded, and how congregations were established throughout the world. Acts is the bridge between the life of Christ and the letters to the churches, giving us the clearest picture of how people became Christians and how the church functioned in the first century.
The Church Beginning in Jerusalem
(Acts 2)
Acts 2 describes the fulfillment of Jesus’ promise to build His church (Matthew 16:18). On the day of Pentecost:
- The Holy Spirit came upon the apostles
- Peter preached the first gospel sermon
- People heard the message in their own languages
- Three thousand souls obeyed the gospel and were baptized
The Lord added the saved to the church (Acts 2:47). This moment marks the beginning of the church of Christ on earth.
The Apostles Preaching the Gospel
(Acts 4:12)
The apostles boldly proclaimed that salvation is found in Christ alone:
“There is no other name under heaven given among men by which we must be saved.”
Their preaching emphasized:
- The resurrection of Jesus
- The fulfillment of prophecy
- The need for repentance
- The command to be baptized
- The exclusivity of Christ as Savior
Their message was simple, powerful, and centered on the gospel.
Examples of Conversion
(Acts 8, 9, 10, 16)
Acts provides multiple examples of how people responded to the gospel. These accounts show a consistent pattern:
- Hearing the message
- Believing in Jesus
- Repenting of sins
- Confessing Christ
- Being baptized immediately
Examples include:
- The Ethiopian eunuch (Acts 8:26–39)
- Saul of Tarsus (Acts 9:1–18)
- Cornelius, the first Gentile convert (Acts 10)
- The Philippian jailer and his household (Acts 16:25–34)
These conversions demonstrate how people became Christians in the first century.
Baptism for the Remission of Sins
(Acts 2:38; Acts 22:16)
Baptism is central in the Book of Acts. Peter commanded:
“Repent, and be baptized… for the remission of sins.” — Acts 2:38
Ananias told Saul:
“Arise and be baptized, and wash away your sins.” — Acts 22:16
In every example of conversion:
- Baptism was immediate
- Baptism was essential
- Baptism was connected to forgiveness
- Baptism marked the moment of salvation
Acts leaves no doubt about the role of baptism in becoming a Christian.
Congregational Autonomy
(Acts 14:23)
As congregations were established, they were organized according to the New Testament pattern.
Paul and Barnabas:
- Appointed elders in every church
- Strengthened the disciples
- Encouraged them to remain faithful
Each congregation was self‑governed, independent, and accountable to Christ alone. There was no hierarchy, no regional authority, and no denominational structure.
The Spread of the Gospel to All Nations
(Acts 1:8)
Jesus told His apostles:
“You shall be witnesses to Me in Jerusalem, and in all Judea and Samaria, and to the end of the earth.”
Acts shows this promise fulfilled:
- Jerusalem — Acts 2–7
- Judea and Samaria — Acts 8–12
- The Gentile world — Acts 13–28
The gospel spread through preaching, persecution, miracles, and the providence of God. By the end of Acts, the message of Christ had reached major cities across the Roman Empire.