SALVATION ACCOMPLISHED. LEO THE GREAT: Our origin, corrupted right after its start, needed to be reborn with new beginnings. A victim had to be offered for reconciliation, a victim that was at one and the same time both related to our race and foreign to our defilement. In this way alone could the plan of God—wherein it pleased him that the sin of the world should be wiped away through the birth and passion of Jesus Christ—in this way alone could the plan of God be of any avail for the times of every generation. Nor would the mysteries—as they pass through various developments in time—disturb us. Instead, they would reassure us, since the faith by which we live would not have differed at any state.
Let them stop complaining, those who speak up against the divine arrangements with a disloyal murmuring and object to the lateness of our Lord’s nativity—as if that which was done in the last age of the world was not applied to previous eras as well. For the incarnation of the Word accomplished by being about to take place the very same thing that it did by having taken place—as the mystery of human salvation never ceased to be active in any earlier age. What the apostles preached, the prophets had also announced. Nor was it too late in being fulfilled since it has always been believed.
Oden, Thomas [General Editor] Ancient Christian Commentary on Scripture: New Testament X: Hebrews 76
(Leo the Great was the Bishop of Rome from 440 to 461.)