For David Goggins, childhood was a nightmare -- poverty, prejudice, and physical abuse shadowed his days and haunted his nights. But through self-discipline, mental toughness, and hard work, Goggins transformed from an overwhelmed, overweight young man with no future into an iconic figure in the U.S. Armed Forces and one of the world’s top endurance athletes. He is the only person in history to complete elite training as a Navy SEAL, Army Ranger, and Air Force Tactical Air Controller, while also breaking records in numerous endurance events, inspiring Outside magazine to call him "The Fittest (Real) Man in America."

In his book "Can't Hurt Me", he shares his incredible life and reveals that most of us only tap into 40% of our abilities. Goggins calls this principle "The 40% Rule," and his story illuminates a path anyone can follow to overcome pain, conquer fear, and reach their full potential.