Everyone has to contribute to the common good. To not do so can be described in one word: selfish.
Randy PauschYou will need to find your passion. Don't give up on finding it because then all you're doing is waiting for the Reaper.
Randy PauschIt's a thrill to fulfill your own childhood dreams, but as you get older, you may find that enabling the dreams of others is even more fun.
Randy Pausch