David Goggins is considered by many as the most resistant man in the world, not only physically but also mentally.Goggins was the only member of the U.S. Armed Forces to complete elite SEAL, Ranger and Air Force training.Any of these achievements would already be impressive, but this is only the beginning for Goggins.He was also the world record holder, recognized by Guinness, for the highest number of elevations on the fixed bar in 24 hours, reaching...