The Gospel According to Luke is the first part of a two-volume compilation that continues the biblical history of God's dealings with humanity found in the Old Testament. It depicts how Jesus fulfills God's promise of salvation to Israel and then to the Gentiles. Luke shows that the preaching and teaching of the early Church representatives are grounded in the preaching and teaching of Jesus during His historical ministry. The Gospel According to Luke, together with Acts of the Apostles, delivers the history of first-century Christianity. This continuity between the historical ministry of Jesus and the ministry of the Apostles is Luke's way of guaranteeing the fidelity of the Church's teaching to the teaching of Jesus.