There is a scene in the movie “The Hustler” where Fast Eddie, played by Paul Newman, says: “It’s a great feeling, boy, it’s a real great feeling when you’re right and you KNOW you’re right. It’s like all of a sudden I got oil in my arm. The pool cue is a part of me… you don’t have to look, you just KNOW. You make shots that nobody’s ever made before.” What the character is describing is being in a state of flow—that enthralled state, when your level of skill matches the level of the challenge. You become so engrossed in what you do that you forget to eat. You escape time. We’ve all been there. It’s what athletes call “being in the zone” and what musicians refer to as “being in the groove.” The concept of flow is the brainchild of psychologist Mihali Csikszentmihalyi. In an interesting talk a few years ago, Csikszentmihalyi talks about the concept of flow and about his more recent book, Good Business: Flow and the Making of Meaning. In it he writes that success is being involved in an endeavor that helps others and, at the same time, makes you feel happy.