The Gospel of Luke and the book of Acts are two volumes of one narrative written by Luke the historian. And both center on the spread of the gospel, but not in the same way. According to Ben Witherington in The Acts of the Apostles: A Socio-Rhetorical Commentary, “One can say then that the Gospel focuses on the vertical (up and down the social scale) universalization of the gospel, while Acts focuses on its horizontal universalization (to all peoples throughout the Empire)” [p. 69].