I turned 40. I've never been much concerned with aging, but this really affected me. Maybe because I assumed it wouldn't. I'm still moving forward, but I've had fairly frequent bouts of anxiety and sleepless nights. I've never feared death, I've feared not being done. I realize now one is never done and perhaps I actually have a very intense fear of death.
I can't really complain about aging and that's kind of a pain. All but one of my friends are older than me, so I just get the "yep, preaching' to the choir" or "Ha, just wait till you're 50." They aren't much help. I'm sure some things have been changing for me slowly for a while, but I also feel like I hit 40 and my warranty ran out. Things seem to just be breaking all the time now.
My life has never and will have a normal path. School, job, family, career promotions, retirement. Upon crossing 40 I've now really been forced to adjust my thinking, what does it mean to be an adult without the mile markers most people measure their lives by?