Doug wrote:Pneumas that had been changed to be like God's would have been of a significantly higher quality than the regular old pneumas, though both would have been physical and invisible nonetheless.
Invisible? Are you saying that these spiritual bodies which we shall have will be invisible?
Will our resurrection bodies be different from that of Christ? Or do you think He was raised as an invisible spirit? Does an invisible spirit eat food as our Lord did after his resurrection? Does an invisible spirit have flesh and bones as our Lord had after His resurrection?
Was our Lord's resurrection "of such a significantly different nature that you wouldn't recognize it"? It's true that some didn't recognize Him as they didn't expect to see Him alive. But He made it clear that he was not a spirit, but the same man. He showed Thomas the nailprints in His hands, which had been made by nailing Him to the cross.
As they were talking about these things, Jesus himself stood among them, and said to them, “Peace to you!” But they were startled and frightened and thought they saw a spirit. And he said to them, “Why are you troubled, and why do doubts arise in your hearts? See my hands and my feet, that it is I myself. Touch me, and see. For a spirit does not have flesh and bones as you see that I have.” And when he had said this, he showed them his hands and his feet. And while they still disbelieved for joy and were marveling, he said to them, “Have you anything here to eat?” They gave him a piece of broiled fish, and he took it and ate before them. (Luke 24:36-43)
Clearly Jesus had the same body after God raised Him from the dead. But it was a changed body. On one occasion, he walked through a closed door.
Jesus was "the first-born of many brethren", the first-born of the resurrection. So all of his disciples from that day to this, and beyond, will be raised with a body similar to His glorious body. We, too, shall have the same body, but a changed body.
Behold! I tell you a mystery. We shall not all sleep, but we shall all be changed, in a moment, in the twinkling of an eye, at the last trumpet. For the trumpet will sound, and the dead will be raised imperishable, and we shall be changed. For this perishable body must put on the imperishable, and this mortal body must put on immortality. (1 Cor. 15:51-53)
Our physical body being replaced by a disembodied spirit would not indicate a change in us. It would be a different entity rather than a change.