A Navy Seal presents a self-help guide -- warrior wisdom that shows us how to overcome life's obstacles with positive action. Two years ago, Eric Greitens unexpectedly heard from a former SEAL comrade, who had been one of the toughest of the tough. But ever since he returned home from war to his young family, he'd been struggling. Without a sense of purpose, plagued by PTSD, and masking his pain with heavy drinking, he needed help. Drew and Eric started writing and talking nearly every day, and Eric set down his thoughts on what it takes to build resilience in our lives. Eric's letters--drawing on both his own experience and wisdom from ancient and modern thinkers--are now gathered here. They explain how we can build purpose, confront the pain in our lives, practice compassion, develop our vocations, find a mentor, create happiness, follow a role model and think about the story of our lives. The lessons are deep, yet practical, and the advice leads to clear solutions. We all face pain, difficulty, and doubt. But with resilience, we can lead vital, flourishing lives.