7. From the words of Peter, therefore, which he addressed in Cæsarea to Cornelius the centurion, and those Gentiles with him, to whom the word of God was first preached, we can understand what the apostles used to preach, the nature of their preaching, and their idea with regard to God. For this Cornelius was, it is said, “a devout man, and one who feared God with all his house, giving much alms to the people, and praying to God always. He saw therefore, about the ninth hour of the day, an angel of God coming in to him, and saying, Thine alms are come up for a memorial before God. Wherefore send to Simon, who is called Peter.”848 But when Peter saw the vision, in which the voice from heaven said to him, “What God hath cleansed, that call not thou common,”849 this happened [to teach him] that the God who had, through the law, distinguished between clean and unclean, was He who had purified the Gentiles through the blood of His Son—He whom also Cornelius worshipped; to whom Peter, coming in, said, “Of a truth I perceive that God is no respecter of persons: but in every nation, he that feareth Him, and worketh righteousness, is acceptable to Him.”850 He thus clearly indicates, that He whom Cornelius had previously feared as God, of whom he had heard through the law and the prophets, for whose sake also he used to give alms, is, in truth, God. The knowledge of the Son was, however, wanting to him; therefore did [Peter] add, “The word, ye know, which was published throughout all Judea, beginning from Galilee, after the baptism which John preached, Jesus of Nazareth, how God anointed Him with the Holy Ghost, and with power; who went about doing good, and healing all that were oppressed of the devil; for God was with Him. And we are witnesses of all those things which He did both in the land of the Jews and in Jerusalem; whom they slew, hanging Him on a beam of wood: Him God raised up the third day, and showed Him openly; not to all the people, but unto us, witnesses chosen before of God, who did eat and drink with Him after the resurrection from the dead. And He commanded us to preach unto the people, and to testify that it is He which was ordained of God to be the Judge of quick and dead. To Him give all the prophets witness, that, through His name, every one that believeth in Him does receive remission of sins.”851 The apostles, therefore, did preach 433 the Son of God, of whom men were ignorant; and His advent, to those who had been already instructed as to God; but they did not bring in another god. For if Peter had known any such thing, he would have preached freely to the Gentiles, that the God of the Jews was indeed one, but the God of the Christians another; and all of them, doubtless, being awe-struck because of the vision of the angel, would have believed whatever he told them. But it is evident from Peter’s words that he did indeed still retain the God who was already known 848 Acts x. 1–5. 849 Acts x. 15. 850 Acts x. 34, 35. 851 Acts x. 37–44. 1097 Chapter XII.—Doctrine of the rest of the apostles.