This is a summary of my talk last month at the European Conference on Flourishing and the Church, Salzburg, Austria. For centuries, scholars have asked what it means to flourish. Aristotle called it eudaimonia, which means a life of purpose and virtue directed toward the highest good. In recent times, positive psychologists have tried to answer the same question. Martin Seligman’s PERMA model, for example, focuses on positive emotion, engagement, relationships, meaning, and achievement. Harvard’s Human Flourishing Program, led by Tyler VanderWeele, adds dimensions like health, virtue, and financial stability. These ideas shape how we currently define a good life. Yet for over two billion Christians, something essential is missing.…