Oecumenius : For the Holy Spirit and the power of the Most High overshadowed the Virgin. (Luke 1:35) And it was said, that I may do your will, O Father (Jn. 6:38); that those whom you have given me, I may not lose any of them. (Jn. 18:9) The title of the book, the Hebrews say, is the Law. Isaiah, teaching about the mystery of the Incarnation of the Only Begotten, heard; "Write for me in it with a man's pen." (Isa. 8:1) That it is a sacrifice and offering. Do you see that the sacrifices were cast aside even before the incarnation? For after not wanting, he says, Burnt offerings and sacrifices, Then I said, "Behold, I have come. Who said, Behold, I come? Christ, obviously. I have come to do your will. But what is the will of the Father, but that the Son be crucified? And that I have come, he says, and I will do your will, it is written in the scroll of the book, he says, about me these things. Thus it is necessary to arrange. For being prophetic, it is a difficulty. The scroll of the book is the bundle of the law, that is, the book of the Old Testament. Therefore, in this Scripture it is written concerning my coming and that I am to be offered for the world. — The Pseudo-Oecumenian Catena on Hebrews