The Holy Spirit empowers believers to declare the gospel among both Jews and Gentiles. In doing so they establish the church. The church is the fulfillment of God’s promises from the beginning of time. Luke’s purpose for writing his Gospel applies to Acts as well: to give an “orderly” account of the early church after Christ’s resurrection. Dedicating the two-volume work to Theophilus, Luke wanted him to have “certainty” about what he had been taught.