The Book of Acts is the second of a two-part work by Luke, the traveling companion and co-laborer of the apostle Paul. The first part of Luke's writings, Gospel of Luke, tells us all that Jesus began to do and teach. The second part, the Book of Acts, tells us what the risen and ascended Jesus continues to do through His church by the power of the Holy Spirit. The testimony of what Christ did in the early church is not only for our encouragement but also our instruction as we seek to be faithful to the mission of proclaiming the gospel and multiplying disciples.