"If you believe that the goal of human life is to maximize happiness, then you are a budding Aristotelian," suggests Edith Hall, who reminds us that 2,000 years ago, Aristotle wrote the most important book on happiness. We become happy through finding a purpose, realizing our potential, and modifying our behavior to become the best version of ourselves, and with these objectives in mind, Aristotle developed a humane program for becoming a happy person. Reflecting on her own life, Hall shows how these teachings are exactly what we need today, distilling his ancient wisdom into ten practical lessons to help us confront life's difficult and crucial moments.