Acts is the sequel to Luke's Gospel — the story of how the message of the risen Jesus moved out from Jerusalem to Judea, Samaria, and the ends of the earth. Through Peter, Paul, and many ordinary believers, the Holy Spirit builds the early church across the Roman world.
“But ye shall receive power, after that the Holy Ghost is come upon you: and ye shall be witnesses unto me both in Jerusalem, and in all Judaea.”
“Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost.”
“Neither is there salvation in any other: for there is none other name under heaven given among men, whereby we must be saved.”