http://triathlete-europe.competitor.com/2010/05/14/david-goggins-toughest-athlete-planet/

"Nevertheless, he’s living the spirit of Ironman to the utmost, discovering just how much he can do. Every day, he’s up and running by 3 a.m. After a 20-mile run, he bikes 20 miles to work. He runs at lunch, if he can. Then it’s back home (on the bike, of course) to join his wife for weight training in the gym. He’s in bed no earlier than midnight most nights. Don’t bother re-reading to check your math: It really does add up to only three hours of sleep a night. When people ask if he uses supplements to help him train, he says that he takes a giant suck-it-up pill every morning and washes it down with a refreshing can of hard. This isn’t boasting. It’s military-speak for the hardest part of Goggins’ daily regimen: getting out of bed.

Goggins takes his suck-it-up pill every morning because no matter how unpleasant it is to swallow, he’s seen something that’s even more unpleasant to contemplate as the alternative. He’s seen “the look.”

It was during one of his SEAL(s) hell week experiences that Goggins saw it. Running on only 15 minutes of sleep in three days, having gone through multiple obstacle courses and other punishing training events, his class had just been let out of the freezing cold water of Southern California. There stood Goggins and his classmates, shivering on the beach, when one of the instructors barked the order to get back in the water. The man beside Goggins turned and looked at him with a hollow gaze. He didn’t say anything. He didn’t have to. “The look” said it all. The man turned and left the group. He quit."

Dear God, forgive us.