" Yet what appears to be impossible is actually progressive. Behind each of these feats is a litany of small steps: history, technology, training — and not just physical training, mental training as well. Success in these danger-fueled activities requires requires incredible psychological and intellectual talents: grit, fortitude, courage, creativity, resilience, cooperation, critical thinking, pattern recognition, high-speed “hot” decision making — on and on, and all under some of the most extreme conditions imaginable. "

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