For those who have been there, Hell Week is a sleepless, bitter cold, gritty, soaking wet, hell on earth where exhausted candidates – pumped full of antibiotics to ward off a variety of infections – survive on sheer heart, tenacity, seemingly incomprehensible physical courage, and about 5,000-7,000 calories per day (given they can muster enough strength to consume them). Hell Week is a short span of eternity at Coronado, California where the SEAL hopeful comes to a reckoning of the soul. Here, he “realizes,” according to Commander Richard Marcinko (USN, ret.), “the body is only tissue and the mind/brain can...