Success: How the Most Dangerous Men on the Planet Succeed and Win!: Develop a US NAVY SEAL Mindset and Become Extraordinary US Navy SEALs win because they understand the difference between having skill and having mental fortitude. There are many skilled people in the world who fall short of achieving true success. During SEAL training it is often the strongest athletes who were the first to quit. Although they had the physicality, they lacked the mental toughness to endure when it mattered most. They lacked the ability to adapt. You must be able to bridge the gap between having skill and persevering when it matters most to achieve success.