And there's where I would differ from those those who speak of "the spirit" or "a spirit" as some "non-physical" or "non-material" thing.
IMNO, "a spirit" and "a flesh-and-blood body" are both physical, material things. In 1 Corinthians 15, Paul doesn't say: In the resurrection, the physical, material becomes spiritual. He says:
- 50 I declare to you, brothers and sisters, that flesh and blood cannot inherit the kingdom of God, nor does the perishable inherit the imperishable. 51 Listen, I tell you a mystery: We will not all sleep, but we will all be changed— 52 in a flash, in the twinkling of an eye, at the last trumpet. For the trumpet will sound, the dead will be raised imperishable, and we will be changed. 53 For the perishable must clothe itself with the imperishable, and the mortal with immortality. 54 When the perishable has been clothed with the imperishable, and the mortal with immortality, then the saying that is written will come true: “Death has been swallowed up in victory.”
I'd have one thing less to grumble about if JWs used the word "transformed", as in "the dead are transformed into spirits." Both are physical and material, but one is mortal and perishable, and the other isn't. As marvelous as changing water into wine, but not, IMO, inconceivable or impossible. I just don't know how to do it myself.