Acts 22:21

Paul was to go to the Gentiles, the Messiah revealed to him, because the Jews would not accept his witness. Specifically the Lord directed Paul to go to the Gentiles who were far away, namely, Gentiles who had no relationship to Judaism (cf. Acts 2:39).

F. F. Bruce concluded that in narrating Paul’s speeches Luke followed the precedent of the Greek historian Thucydides. Thucydides wrote that he composed the speeches in his history but tried to reproduce the general meaning of what the speakers said. [Note: Bruce, "Paul’s Apologetics . . .," p. 379.] Under the Holy Spirit’s inspiration Luke received guidance to write exactly what God wanted written. Almost all scholars agree that Luke summarized most if not all of the speeches that he recorded in Acts.