" On the flow path, we are drawn forward by fire; by powerful hedonic instincts; by our deep need for autonomy, mastery, and purpose deeply fulfilled; by dizzyingly feel-good neurochemistry; by a spectrum of joy beyond common ken; by the undeniable presence of our most authentic selves; by a cognitive imperative to make meaning from experience; by the search engine that is evolution and its need for innovation; and by the simplest of truths: life is long and we’re all scared and, in flow, at least for a little while, we’re not. "

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