Always something to learn or re-learn.
What I knew may not apply any more. What I don't know may be the key.
That I'm not special and have to follow the rules of success and pay my dues.
That anything gained can be lost (and re-gained).
That age and injuries are realities that have to be accommodated.
"You must have a very strong reason for doing an exercise. If you don't, scrap it and move on." -Jim Wendler