the REAL call of Duty

I came across this quote ,"without duty, life is soft and boneless" by Joseph Joubert. By the end of your life; what would you have accomplished? What would you have give yourself to accomplish?

I came across another story some time back and I think the both of them makes good combination.
Hercules was sent down by Zeus with to save and help man kind. Through out his life; he work and slogged to save human lives. Due to his heroic actions; he made too many enemies and got tired of all the action and ask Zeus; "How do I know if I have completed the tasks you have given me?" "son, only by your last breath, would you then, know if you have completed what I set you out to do."

I am writing this with some of my friends in mind; give yourself some duty; some task; some mission to accomplish. We are all gonna screw up some way or another; solets just enjoy the screwing up process but also keeping in mind a duty we give ourselves.