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 the mark of 4,030 elevations on the fixed bar in just 17 hours.In addition, he also collects a number of impressive results in overseas events, such as overseas and ultratriathlons.He has already covered more than 320 kilometers directly, in about 39 hours, which is equivalent to almost 8 marathons.Everybody can learn something from Goggins' history.However, while many inspiring autobiographies surprise readers with stories about the author's past, David Goggins goes much further, explaining the concepts that led him to his success.So, besides Goggins' history serving as proof that you can change things regardless of what your background is until today, his rules of life also show us how to achieve things that are often judged as impossible.