Cornelius was a sincere and good man, but he was also a gentile who did not know the gospel of Jesus Christ. Peter was key apostle who had experienced the power of God through the preaching of Pentecost, in Jerusalem and beyond. Yet his ministry was primarily to Jews, not to Gentiles. God is about to use visions to challenge each of these men and bring them together to open the door of the gospel to the Gentiles.