What is too old for you?

Do you think that age is relative like riches. That we only get old as we think we are. and that we are not too old enough to be an achiever. what is too old enough for you to still believe that there is something that you can accomplish in life. do you equate old age with retirement. i would like to believe that even in old age that we can still bear fruit. do you still be able to help than a burden when you are already old?