In his New York Times bestselling book Courage is Calling , author Ryan Holiday introduced the Stoic Virtues with the first virtue: courage. In this much-anticipated second book of the series, Holiday explores the importance of self-discipline, the next Stoic virtue It was Eisenhower who said that freedom is the opportunity to practice self-discipline. Bestselling author Ryan Holiday explains how we must embrace the virtue of temperance, defined in modern times as self-discipline, in order to successfully practice the other Stoic virtues. Now more than ever, we need self-discipline, willpower, and moderation as we struggle to maintain balance in a world with smartphones designed to hook us, food genetically engineered to be irresistible, and a culture that celebrates those who have and spend the most.   In Self-Discipline is Salvation , Holiday draws on the stories of historical figures we can emulate as pillars of self-discipline, including Lou Gehrig, Queen Elizabeth II, Toni Morrison, and John Wooden. Readers will learn the Golden Mean from Aristotle, establishing the idea that virtue is usually the midpoint between two excesses, and will discover the true meaning of ambition from Marcus Aurelius. Through these engaging examples, Holiday teaches readers the power of self-discipline and balance, and cautions against the perils of extravagance in any aspect of life.   Stoicism is a philosophy for the people. At the heart of Stoicism are four simple virtues: courage, temperance, justice, and wisdom. Everything else, the Stoics believed, flows from them. Self-Discipline is Salvation will guide readers down the path to self-mastery, reminding us all that the key to happiness is not more, more, more , but having the discipline to know when you have the right amount of the right stuff.