Franklin Delano Roosevelt was a dumbass.
I should probably explain that. Sure, he was a stellar president, but he also said some pretty stupid things. "The only thing we have to fear is fear itself?" Please. Didn't he ever see a grizzly bear in person? No, I guess that was his ancestor, Theodore.
But when you're an elite soldier, you actually have to live up to that quote. Navy SEALs, Marines, and Special Forces face life-threatening danger on a regular basis, and if they got hung up on the fear, they'd never get through their day. And while most of us will never go through what they experience, there's no reason why we can't apply their fear-crushing tactics to our own lives.