" For starters, risk is always relative. While some danger must be courted for flow, confrontations with mortality are not required. In fact, even physical risk itself is optional. A shy man need only cross the room to say hello to an attractive woman to trigger this rush. In casual conversation, merely telling someone the truth can serve the same purpose. “To reach flow,” explains Harvard psychiatrist Ned Hallowell, “one must be willing to take risks. The lover must lay bare his soul and risk rejection and humiliation to enter this state. The athlete must be willing to risk physical harm, even loss of life, to enter this state. The artist must be willing to be scorned and despised by critics and the public and still push on. And the average person — you and me — must be willing to fail, look foolish, and fall flat on our faces should we wish to enter this state. "

― Steven Kotler , The Rise of Superman: Decoding the Science of Ultimate Human Performance