He is the only person to have completed Navy SEAL training, Army Ranger School, and Air Force Tactical Air Controller training. The mindset has helped Goggin become arguably the best endurance athlete of all-time. 'And I took all the negative things - I need to go to the hospital, this and that - and I used it.' He ended up completing the final 30 miles nonstop. 'I believed it enough to where my body said 'He's not gonna stop,'' Goggins said. The point was it got him to visualize getting up from the chair, then taking one step, and then another. Whether it was true was irrelevant, he told Bilyeu. Goggins began telling himself he was the toughest, strongest, most determined person on Earth. It's the mantra you repeat to stay calm, or the adrenaline-pumping chant you use to get fired up. Self-talk is the quiet, if silent, reminders you give yourself to stay assured the task can be completed. It lets you see yourself as the kind of person who perseveres, not the kind who gives up.

It's critical for pushing through intense pain and suffering because it recalls the reason for engaging in the task at all.

Visualization means seeing yourself accomplishing your goals, Goggins said.

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