What is the difference between Acts 1-12 and  Acts 13-28?

The book of Acts in the Bible is divided into 28 chapters and can be seen as having two main sections: Acts 1-12 and Acts 13-28.

1. Acts 1-12: This section primarily focuses on the early Christian church in Jerusalem and the ministry of Peter. It begins with the ascension of Jesus and the coming of the Holy Spirit at Pentecost, which empowers the disciples to spread the gospel. The key events include the conversion of Saul (who becomes Paul), the martyrdom of Stephen, and Peter's miraculous escape from prison. The gospel is also opened up to the Gentiles (non-Jews) in this section, notably with the conversion of the Roman centurion Cornelius.

2. Acts 13-28: This section primarily focuses on the missionary journeys of Paul as he, and his companions, spread the gospel throughout the Roman Empire. This includes regions such as Asia Minor, Macedonia, Greece, and eventually to Rome itself. This section includes key events such as the Council of Jerusalem, where it was agreed that Gentile converts did not need to fully adhere to the Law of Moses, and Paul's eloquent sermon at Mars Hill in Athens. The book ends with Paul under house arrest in Rome, still preaching the gospel.

In summary, the difference between Acts 1-12 and Acts 13-28 is primarily the focus of the narrative - the former focuses on the early church and Peter's ministry, while the latter focuses on Paul's missionary journeys.