I would think that in the big picture Evolution has proved that every animal behavior on planet earth is "use it or lose it".
This is very true in nature it is use it or lose it, but not in a few yr span it happens over thousands of generations. Just as we don’t use our appendix, or tonsils, and giraffes have long necks.
"So far this is the oldest that I've been"
'If you can make it through the nite, there's a brighter day'
"I'm out the game, put the 2nd string in."
"live with the pain and keep trying or die knowing you never gave anything a chance"
"Death is not the greatest loss in life. The greatest loss is what dies inside while still alive"
"No one can take away your dreams"