The doctrine of the Resurrection is a bit nuanced. The only example of resurrection we have is Jesus, and we know that Jesus rose with the same body He had prior. That's why the tomb was empty. Jesus was able to show the wounds of His crucifixion to His followers.
So yes, these bodies are what are raised up. But resurrection doesn't mean this body, as it is, forever. St. Paul likens it to planting a seed in the ground, when you plant a seed it "dies" but rises to become something more than it was. An acorn grows into an oak tree, and the oak tree is far more glorious than the little acorn. There is a continuity between the acorn and the oak tree though, you don't plant an acorn and then get an apple tree.
So the body is "sown" in its present state: mortal, corruptible (that is, able to age, get sick, decay, rot) but it is raised immortal and incorruptible. It is "sown" in dishonor and raised in honor.
St. Paul then uses two words that can easily be misunderstood, he says that the body is "sown" (and I'll quote the Greek here) a soma psuchekon, but it is raised a soma pneumatikon. Translated, it is "sown" a "soulish body" but it is raised a "spiritual body". These terms Paul uses, "soulish" and "spiritual" are sometimes misunderstood as though to mean "physical" and "spiritual", but that's not what they mean. They are not about what the body is composed of materially--that is, the matter which makes up the body--but rather the kind of quality, or state, or life which the body has. It's like saying there are "row boats" and there are "steam boats". A row boat is not a boat made out of rows (that wouldn't make any sense), just as a steam boat isn't a boat made out of steam (again, that makes no sense). Rather a row boat is a boat which is powered, moved, by rowing; just as a steam boat is a boat which powered, moved, by a steam engine. So, like this, the difference between the present "soulish body" and the future "spiritual body" is the kind of existence the body has. The present body is "soulish", it is animal, dependent upon appetite and desire, its life is a mortal, corruptible life--it requires sustenance, it gets sick, it is weak, it gets old, it dies. But the future body is "spiritual", that is, it has been given life by the Holy Spirit, it is glorified, it is transformed, it cannot suffer, it cannot get weak, it cannot get sick, it cannot perish.
Resurrection means that the body becomes more than what it is now. Better than what it is now. We don't become less human, we become more human.
Think of it this way, in a very real sense you are just a shadow of yourself. There is so much more to you that could be, but isn't, because of sin, because of death, because of the weakness of your flesh, because of the limitations imposed by the suffering, struggle, and mortality of this life. In the resurrection you don't become less you, you become more you. You become the you that can exist because of the the perfection and glory of God in Jesus Christ. A you whose identity is rooted not in your mere animal desire which leads to suffering and pain and death; but a you rooted in the Jesus Christ who came to bring healing and renewal to all of creation, and to share in that healing and renewal of all creation.
The perishing, the temporal, the vain things of this life which have no permanence they don't matter. The power, the glory, the things we think are so important about this present life are really, and in truth, empty things. What does it matter if one is rich now? Money has no permanence, wealth is fleeting, it is all moth and rust. What does it matter if you are a king, or the billionaire CEO of a major corporation. What does it matter that you are famous, or successful in finances, or that you managed to find some kind of "popularity" in this life. All these things are fleeting, from dust you came and to dust you shall return.
That is why all these things, they don't matter. These treasures here, they're all meaningless vanities. There are true treasures in this life, but they aren't things, they aren't objects, they aren't status, or position, or tokens of wealth or success. The treasures here are the relationships we make with our fellow human beings, the bonds and friendships we have. The time and the resources we spent loving others. The kindness we showed other people. The hug we gave to a friend who was in pain. The small gift we gave to the beggar who needed food. These are our treasures, these are the things from this life that will have meaning in the next. For all which is truly good will never perish or pass away. All which has true substance, and real meaning, is eternal, because in Christ all which is truly good is purposed and destined to last. That is why we believe in the resurrection, in the life of the world to come.
-CryptoLutheran
But I guess I won't even care at that point. I do wonder about age, though... Perhaps a slight difference in appearance is why Jesus was mistaken for the gardener by Mary at first?
