And then what? I can look forward to the slow decline of life, or perhaps the unexpected extinction of life too short. And then death. But if I die in a state of grace, thanks to the salvation given to me by my Lord, given and not earned, for nothing I can do can effect my Salvation except through the Grace of God, I will eventually go to my God.
I will exist only as spirit, but that will not be my final state, because I have a promise:
Those who eat my flesh and drink my blood have eternal life, and I will raise them up on the last day; --John 6:54and
Then I saw a new heaven and a new earth; for the first heaven and the first earth had passed away, and the sea was no more. --Rev 21:1
"We believe in the true resurrection of this flesh that we now possess" (Council of Lyons II: DS 854). We sow a corruptible body in the tomb, but he raises up an incorruptible body, a "spiritual body" (cf. 1 Cor 15:42-44). --CCC 1017So someday I can look forward to a new body, with good teeth.