"Thomas had followed his passion to the Zen Mountain Monastery, believing, as many do, that the key to happiness is identifying your true calling and then chasing after it with all the courage you can muster. But as Thomas experienced that late Sunday afternoon in the oak forest, this belief is frighteningly naive. Fulfilling his dream to become a full-time Zen practitioner did not magically make his life wonderful. As Thomas discovered, the path to happiness--at least as it concerns what you do for a living--is more complicated than simply answering the classic question "What should I do with my life?" A" --