Your body is coming apart. Maybe slowly, maybe faster than you'd like, but the outer person is wasting on a schedule you don't set. Paul doesn't scold that wasting. He interprets it.
In this message from 2 Corinthians 4:16–5:10, Pastor Josh Turansky walks through some of the most tender and sober verses Paul ever wrote: the tent that comes down, the house God already has standing, the groaning that turns out to be homesickness rather than despair, and the Spirit given as a down payment on a home we haven't seen yet. Along the way, this passage confronts the idol of sight, the lie that the visible self is the real self, and it ends where Paul ends, at the judgment seat of Christ, where what we did in the body matters.
For the saint who is wasting, there is renewal happening in the part decay cannot touch. For the one who looks fine on the outside, there is an appearing no one skips. Either way, we walk by faith, not by sight, and we make it our aim to please him.