And all the Jews even now teach that it was the unnameable God who spoke to Moses. Wherefore the prophetic Spirit, rebuking them through Isaiah the prophet foretold above, said, as we wrote before, "The ox knows its owner, and the ass its master's crib; but Israel has not known me, and my people has not understood me." And Jesus the Christ also, because the Jews did not know what the Father is and what the Son is, likewise rebuking them, himself said, "No one has known the Father except the Son, nor the Son except the Father and those to whom the Son shall reveal him." Now the Word of God is his Son, as we said before. And he is also called Angel and Apostle; for he himself announces whatever must be known, and is sent to declare whatever is announced, as our Lord himself also said, "He who hears me hears him who sent me." And from the writings of Moses also this will be made plain. For it is said in them thus: "And the Angel of God spoke to Moses in a flame of fire out of the bush, and said, I am He who is, the God of Abraham, the God of Isaac, the God of Jacob, the God of your fathers. Go down into Egypt and bring forth my people." The things that follow from those you can learn if you wish; for it is not possible to write down everything in this work. But these words were spoken for proof that Jesus the Christ is the Son of God and Apostle, being formerly the Word, and appearing sometimes in the form of fire, and sometimes in an incorporeal image; but now, by the will of God, having become man for the human race, he endured to suffer also whatever the demons brought about that he should suffer at the hands of the senseless Jews. These, though they have it expressly stated in the writings of Moses, "And the Angel of God spoke to Moses in a fire of flame in a bush, and said, I am He who is, the God of Abraham and the God of Isaac and the God of Jacob," say that it was the Father of all and Creator who spoke these things. Wherefore the prophetic Spirit, rebuking them, said, "But Israel has not known me, and my people has not understood me." And again Jesus, as we showed, while among them said, "No one has known the Father except the Son, nor the Son except the Father and those to whom the Son shall reveal him." The Jews, therefore, having always supposed that it was the Father of all who spoke to Moses, when in fact it was the Son of God who spoke to him, who is called both Angel and Apostle, are justly convicted both by the prophetic Spirit and by Christ himself, as having known neither the Father nor the Son. For those who affirm that the Son is the Father are convicted of neither knowing the Father, nor of perceiving that the Father of all has a Son; who, being the Word and Firstborn of God, is also God. And formerly he appeared to Moses and to the other prophets in the form of fire and in an incorporeal image; but now, in the times of your dominion, as we said before, having become man through a virgin according to the will of the Father, for the salvation of those who believe in him, he submitted to be despised and to suffer, that by dying and rising again he might conquer death. And what was said to Moses out of the bush, "I am He who is, the God of Abraham and the God of Isaac and the God of Jacob and the God of your fathers," is significant of the fact that these men, even after death, remain and belong to Christ himself; for these were the first of all men to occupy themselves with the search for God—Abraham being the father of Isaac, and Isaac the father of Jacob, as Moses also wrote.