With everything that is complex we learn. If you don't learn then it's an utter and abject failure. If you do learn and you're able to apply that to the next situation then you take away a measure of success.
Wrinkles should merely indicate where smiles have been.
Anyone who stops learning is old whether at twenty or eighty. Anyone who...
Age is an issue of mind over matter. If you don't mind it doesn't matter.