In 2 Corinthians 5 the heavenly body (the "building" opposed to the earthly "tent") is pictured as already existing in heaven:
Narkissos,
Such positive statements were assurances to the Faith of the certainty of the promises already made by Paul. This was a guarantee to them as if it already happened to them because of their Faith in Christ the one that will perform such tasks and now existing in such heavens. But we also know that this is also a projection or look into the future when such promises made by Christ will be fulfilled literally by Him for Paul also continued to say: 6 Therefore we are always confident, knowing that, whilst we are at home in the body, we are absent from the Lord: 7 (For we walk by faith, not by sight:) 8 We are confident, I say, and willing rather to be absent from the body, and to be present with the Lord. 9 Wherefore we labour, that, whether present or absent, we may be accepted of him. 10 For we must all appear before the judgment seat of Christ; that every one may receive the things done in his body, according to that he hath done, whether it be good or bad.
We find similar assurances regarding our Justification or being Saved as if we have already escaped such judgment. Yet we should never lose sight of the fact that: Mt 10:22 And ye shall be hated of all men for my name’s sake: but he that endureth to the end shall be saved. And so "we must all appear before the judgment seat of Christ." The scriptures simply do not prejudge our intentions and keep this positive attitude as if a favorable outcome for us is inevitable.
Narkissos: The next (probably post-Pauline) step occurs when what is already is heaven is regarded as the true being of Christians who, while physically on earth, are already (spiritually) resurrected in heaven with Christ. What is expected, then, is no longer a resurrection but a revelation or manifestation of this true being, e.g. Colossians 3: So if you have been raised with Christ, seek the things that are above, where Christ is, seated at the right hand of God. Set your minds on things that are above, not on things that are on earth, for you have died, and your life is hidden with Christ in God. When Christ who is your life is revealed, then you also will be revealed with him in glory.
Such verses are dealing with our being born again in Christ and thus raised with Him to a new found status continuing Paul's theme regarding our Justification or being Saved. Our being dead to sin is not dealing with the resurrected nature we will some day literally attain. Christ as judge is mindful of our existence so our hope continues (not a literal existence in some non-human form) by being hidden with Christ. It leaves all that to this future time when we will be revealed with him in glory. What is expected then is still a physical and human resurrection (John 11:24,25) since such hidden ones will be favorably judged at such a time and revealed to the world. It remains true that despite attempts to speed up matters as the WT and some others are doing making more of such texts than intended that: 2Ti 2:18 Who concerning the truth have erred, saying that the resurrection is past already; and overthrow the faith of some.
The few easily explained instances where our Lord was not recognized after His resurrection are overshadowed by the 40 days that our Lord walked and talked with his disciples. Such attempts at spiritualizing a man that could conceal himself in the midst of a crowd trying to kill him (Luke 4:30) are countered when we learn. Acts 1:3 To whom also he shewed himself alive after his passion by many infallible proofs, being seen of them forty days, and speaking of the things pertaining to the kingdom of God: 4 And, being assembled together with them, commanded them that they should not depart from Jerusalem, but wait for the promise of the Father, which, saith he, ye have heard of me.5 For John truly baptized with water; but ye shall be baptized with the Holy Ghost not many days hence.
Joseph