" The most devoted complete a 25-mile run every day for a thousand consecutive days. They wear straw sandals and carry a knife at their waist, to be used to kill themselves should they fail to continue. After five years, they conduct a nine-day fast, after which their senses are heightened to such a degree that they can hear ash fall from an incense stick. In the seventh year of their pilgrimage, the monks undertake the “Great Marathon” of 52.5 miles a day every day for a year. "

― Scott Jurek , Eat and Run: My Unlikely Journey to Ultramarathon Greatness