6 Now I know what you are waiting for; I understand what you would hear from me. This too will I briefly declare, as the Lord enables me; “ascending and descending unto the Son of Man.” How— if they descend to Him, He is here; if they ascend to Him, He is above. But if they ascend to Him, and descend to Him, He is at once above and here. It cannot any way possibly be, that they should ascend to Him, and descend to Him, unless He be both there whither they ascend, and here whither they descend— How do we prove that He is both there, and that He is here?
Let Paul, who was first Saul, answer us. He found it by experience, when he was first a persecutor, and afterwards became a preacher; first Jacob, afterwards Israel; who was himself too “of the stock of Israel, of the tribe of Benjamin.” In him let us see Christ above, Christ below. First, the very Voice of the Lord from heaven shows this; “Saul, Saul, why do you persecute me?” What! Had Paul ascended into heaven? Had Paul so much as cast a stone into heaven? He was persecuting the Christians, binding them, haling them to be put to death, searching them out in every place where they lay hid, when they were found on no consideration sparing them.
To whom the Lord Christ says, “Saul, Saul.” Whence cries He? From heaven. Therefore He is above. “Why do you persecute Me?” Therefore He is below. Thus have I explained all, though briefly, yet as well as I could to you, Beloved. I have ministered to you according to my duty, and now for your duty, do ye think upon the poor. Let us turn to the Lord, etc.
Source: Sermons on Selected Lessons of the New Testament (New Advent)