Anyone who stops learning is old, whether at twenty or eighty. ~Henry Ford
In the central place of every heart there is a recording chamber. So long as it receives a message of beauty, hope, cheer, and courage - so long are you young. When the wires are all down and our heart is covered with the snow of pessimism and the ice of cynicism, then, and only then, are you grown old. ~Douglas MacArthur
How old would you be if you didn't know how old you were? ~Satchel Paige
PS: Happy birthday, mwheel! Octogenarian ain't bad at all, it does cut you some slack.