Before becoming an icon of mental toughness and personal transformation, David Goggins kept to himself. Very few people knew about his accomplishments, his crazy workout routine, and unbelievable stories of mental resilience. Jesse Itzler, a multimillionaire entrepreneur, saw David for the first time during David’s first 100-mile run in San Diego (the one where Goggins … Continue reading #15: Developing Mental and Physical Toughness. Observations From “Living With a SEAL” by Jesse Itzler (Part 1)