Oh please. I have written this many times. I have been accused so often of denying the bodily resurrection - without which our faith is in vain - that I was tempted to just make what I wrote as a footer on all my posts.
And you are completely wrong. John 17 says nothing about a "glorious essence," but only about "glory." You added a completely unnecessary word to Christ's wonderful high priestly prayer. In fact, in v. 22 Jesus said He is giving that same glory to His disciples, who were very certainly flesh and blood and therefore human.
Yes, eesence is not in that passage, but it is implied.
But - never mind - you have a more explicit statement of that in 1 Cor. 15.
(This is from an earlier thread, months ago. But pertinent here)
In 1 Cor. 15:40 we come to a very important, oft-overlooked, detail. Overlooked in application, the
origins of these two Adams. (Skipping v. 46 for this post):
"The first man is of the earth (ἐκ γῆς), earthy: the second man is the Lord from heaven (ἐξ οὐρανοῦ) ."
This passage is a continuation of verse 40: somata epigeia and somata epourania now become "ek ges" and "ex ouranou". This preposition (ek, ex - the forms only differ because of euphonics) shows origin. Adam came
from the earth, from the dust. This brings to mind the very passage from Genesis. The "Second Adam" came
from heaven.
Note: In both cases, the origins determine the essence of who these two are - and (v. 48) the essence of their "followers".
Verse 49 says that "we shall [or "let us"] bear the image of the heavenly man" (the Second Adam, from heaven).
Now here is the Preterist application:
We shall be like Christ.
And what is Christ like - according to this passage? He is like He was when He came to Earth. He is
spiritual.
Was Christ fleshly before he came here to Earth? No. He was pure Spirit.
We - according to this passage - will also be like Him.
Pure spirit.
We cannot have part Adam's essence ("dust") and part Christ's, seeing that we could not then "enter into the Kingdom of God". "Dust" has to do with "flesh and blood", not spirit.
(end of quote)
So, John, how is it an improvement over what Christ was in eternity past to have a physical body now? What a radical change in the Godhead. The timeline of eternity (so to speak) split in half - all the time after the Incarnation Christ having now a physical body.