The world’s greatest bodybuilder, the highest-paid movie star, and the leader of the world’s sixth-largest economy sound like different people—but they’re all Arnold Schwarzenegger. His extraordinary success was no accident: it was the result of clear vision, big thinking, hard work, resilience, direct communication, curiosity, and a commitment to giving back, all rooted in one lesson from his father—be useful. In Be Useful, written in Arnold’s blunt and powerful voice, he shares the tools that shaped his life, illustrating them with personal stories of triumph and failure, some told for the first time. From escaping poverty in rural Austria to conquering multiple worlds, Arnold shows how purpose, self-reliance, and service can build a meaningful life. No one is coming to rescue you—but the good news is, you are all you need.