I'm going to Mass right now so I'll take a look at your reply mañana...
I mean that when "Athanasius" describes the oneness in the Person of the Son AND the union of the two natures as "the taking up of Manhood into God", just by the "upness" of it, there is kind of a, what, a foreshadowing of the Ascension.
Temporally and in our liturgical language we say, "You have gone up on high and taken captivity captive," about the Ascension. But extra-temporally, eternally in that Manhood of Christ is elevated, "taken up" into God, it is as though, speaking very loosely, "before there was any talk of God 'coming down' to earth, God has 'already' taken manhood up into Himself. So if Manhood was taken up, could mankind be far behind?"
More Generally we can see every step of the sacred history of redemption as a kind of "coming true". For example, in the "Apostolic Constitutions" there is a wonderful, prototypical prayer over the gift. It describes Creation as salvific: dry land so we could stand somewhere, light so we could see, food so we wouldn't starve.
And then Adam and Eve are clothed; Cain is protected; Noah is saved from the flood, Abraham, Jacob, Joseph, blah, blah. But "all along" there was the "coming true" of the taking of the Manhood into God, which again "comes true" in the Ascension.
One more try - in a time crunch here: At first glance the Ascension is just about IHS. So, He sitteth at the right hand of the Father. Well, that's nice for Him, isn't it?
But it is also the coming true of our salvation, of the Incarnation, of everything God ever meant and intended. In IHS, we too sit at the right hand of the Father. The Ascension is for us.
Is that any less opaque?