Over 5 million copies sold. For David Goggins, childhood was a nightmare – poverty, prejudice, and physical abuse marked his days and haunted his nights. However, through self-discipline, mental strength, and hard work, Goggins transformed from a depressed, overweight young man with no future into an icon of the U.S. military and one of the best endurance athletes in the world. He is the only man in history to complete elite training as a Navy SEAL, Army Ranger, and Air Force Tactical Air Controller. He set numerous records in various endurance events, which inspired Outside magazine to name him the fittest man in America. In this profanity-free edition of "Can't Hurt Me," he shares his incredible life story and demonstrates that most of us only tap into 40% of our capabilities. Goggins calls this the 40% rule, and his story highlights a path that anyone can take to push beyond pain, overcome fears, and reach their full potential.