Acts 1:1-5
The books of Acts is the second volume written by Luke to his friend Theophilus. Luke was a companion of Paul in his missionary journeys and a physician (cf. Colossians 4:14).
He describes himself in his first work (the gospel of Luke) as one who had a “perfect understanding of all things from the very first” regarding the teaching and actions of Jesus. He gave that as the motivation for his first missive to his friend.
Luke finished his gospel with an account of Jesus’ ascension, and takes up the narrative at that exact place in the book of Acts. He relates again the promise of Jesus that his disciples would be baptized in the Holy Spirit, and preach first the gospel of the kingdom in Jerusalem.
Later in the book we read of the fulfillment of this promise (cf. chapter 2), one of the most important events in the history of God’s dealings with mankind.
The book of Acts is a book of history. It recounts the first gospel sermon, the establishment of the Lord’s church, and the spread of the Christian faith in the first century. It is a message all men should read avidly.