Exodus 33:22

9. And the Word spake to Moses, appearing before him, “just as any one might speak to his friend.” But Moses desired to see Him openly who was speaking with him, and was thus addressed: “Stand in the deep place of the rock, and with My hand I will cover thee. But when My splendour shall pass by, then thou shalt see My back parts, but My face thou shalt not see: for no man sees My face, and shall live.” Two facts are thus signified: that it is impossible for man to see God; and that, through the wisdom of God, man shall see Him in the last times, in the depth of a rock, that is, in His coming as a man. And for this reason did He [the Lord] confer with him face to face on the top of a mountain, Elias being also present, as the Gospel relates, He thus making good in the end the ancient promise.

You ought to be very much ashamed of yourself on this account too, for permitting him to appear on the retired mountain in the company of Moses and Elias, whom he had come to destroy. This, to be sure, was what he wished to be understood as the meaning of that voice from heaven: “This is my beloved Son, hear Him”, Him , that is, not Moses or Elias any longer. The voice alone, therefore, was enough, without the display of Moses and Elias; for, by expressly mentioning whom they were to hear, he must have forbidden all others from being heard. …

28. Add, too, that which the Lord afterward said to Moses, “Thou canst not see my face: for there shall no man see my face, and live. And the Lord said, Behold, there is a place by me, and thou shall stand upon a rock: and it shall come to pass, while my glory passeth by, that I will put thee into a watch-tower of the rock, and will cover thee with my hand while I pass by: and I will take away my hand, and thou shalt see my back parts; but my face shall not be seen.”

Jacob in his flight from his brother left behind in his father’s house great riches and made his way with nothing into Mesopotamia. Moreover, to prove to us his powers of endurance, he took a stone for his pillow. Yet as he lay there he beheld a ladder set up on the earth reaching to heaven and behold the Lord stood above it, and the angels ascended and descended on it; the lesson being thus taught that the sinner must not despair of salvation nor the righteous man rest secure in his virtue. To pass over much of the story (for there is no time to explain all the points in the narrative) after twenty years he who before had passed over Jordan with his staff returned into his native land with three droves of cattle, rich in flocks and herds and richer still in children. …

7. Moreover, that you may be sure that this is He who was seen of Moses, hear Paul’s testimony, when he says, For they all drank of a spiritual rock that followed them; and the rock was Christ . And again: By faith Moses forsook Egypt , and shortly after he says, accounting the reproach of Christ greater riches than the treasures in Egypt . This Moses says to Him, Shew me Thyself . Thou seest that the Prophets also in those times saw the Christ, that is, as far as each was able. Shew me Thyself, that I may see Thee with understanding . But He saith, There shall no man see My face, and live . For this reason then, because no man could see the face of the Godhead and live, He took on Him the face of human nature, that we might see this and live. And yet when He wished to shew even that with a little majesty, when His face did shine as the sun , the disciples fell down affrighted. …

16. Was it without reason that Christ was made Man? Are our teachings ingenious phrases and human subtleties? Are not the Holy Scriptures our salvation? Are not the predictions of the Prophets? Keep then, I pray thee, this deposit undisturbed, and let none remove thee: believe that God became Man. But though it has been proved possible for Him to be made Man, yet if the Jews still disbelieve, let us hold this forth to them: What strange thing do we announce in saying that God was made Man, when yourselves say that Abraham received the Lord as a guest? What strange thing do we announce, when Jacob says, For I have seen God face to face, and my life is preserved ? The Lord, who ate with Abraham, ate also with us. …

33. And yet since we read that the Son is the hand (for it is written: “Hath not My Hand made all these things?” and elsewhere: “I will place thee in the cleft of the rock, and I will cover thee with Mine hand, I have placed My hand under the covering of the rock,” which refers to the mystery of the Incarnation, because the eternal Power of God took on Itself the covering of a body), it is certainly clear that Scripture used the term hand both of the Son and of the Holy Spirit.

The sea when it bore Him was still and calmed, and how came the lap of Joseph to bear Him? The womb of hell conceived Him and was burst open, and how did the womb of Mary contain Him? The stone that was over the grave He broke open by His might, and how could Mary’s arm contain Him? Thou camest to a low estate, that Thou mightest raise all to life! Glory be unto Thee from all that are quickened by Thee! Who is able to speak of the Son of the Hidden One who came down and clothed Himself with a Body in the womb? He came forth and sucked milk as a child, and among little children the Son of the Lord of all crept about. They saw Him as a little Child in the street, while there was dwelling in Him the Love of all. Visibly children surrounded Him in the street; secretly Angels surrounded Him in fear. …