The Creed and core doctrine · Question 11
If the soul goes to heaven, why does the body have to rise again on the last day?

The question: “Isn't the body a shell you throw away, and the soul the real me?”
The Church's answer: In the Catholic faith a human being is not a soul making temporary use of a body but a person in whom body and soul are one. Death separating the two is not the natural-looking final completion; it is a wound to be overcome. That is why the Creed does not stop at the immortality of the soul but professes ‘the resurrection of the body.’ We believe that just as Christ rose in the body, we too will rise in the body on the last day.
The resurrection is not a decayed body returning to earthly life to repeat the same illnesses and limits it has now. Nor is it God swapping my body for someone else's body that no one could recognize. It is this body being changed into a glorious body that cannot decay, while keeping a real continuity with the one I have now. The ‘how’ of it and what it will look like go beyond our imagination and our scientific explanations, so we don't go inventing the details.
If they press further: “Then what happens to a disability, a scar, or someone's age?” — the Church believes that the risen body is no longer bound to pain and death, but it does not teach how old each person will look or which features remain. It is more honest to say only this much — the hope that wounds are healed and the belief that a person's own identity does not disappear — and to leave undecided what has not been made known.
In one sentence: “The body isn't a shell to be thrown away; it's a part of who I am. On the last day God will raise us as whole people, body and soul, into a life that cannot decay.”