the hardest part for me to truly believe, since i'm currently in my 20s and enjoy work, is that i'll have to retire. is it true that when i get old i won't be able to program/manage or find some kind of reasonably enjoyable and sustainable employment? will my flaws, such as physical and possibly memory constraints, out weigh my virtures, such as experience and knowledge? there's so much unknown to getting old and i am so confident and able right now. do i really need to be scared of old age?