For over 20 years, Dr Runels studied and interviewed the healthiest of his patients. From soldiers to preachers, from professors to coaches; he asked and tested what the healthiest practiced. For over 40 years, he practiced and read and then practiced more to see how to nurture strength and boldness. For 12 years, he worked as an emergency room physician, often for days without sleep, studying how to conserve energy and nurture courage. Here's a distillate...