Moral Wisdom introduces readers to moral theory through a Catholic lens. In a warm, conversational style, Father Keenan shares a wealth of stories and examples to highlight the resources in the Catholic tradition for developing moral wisdom. Connecting formative influences of the Catholic heritage with themes of love, consciences, sin, and suffering, the book helps readers appreciate what gives meaning to our lives.

The third edition has been revised throughout to help the reader better understand how to develop and apply moral wisdom in real life. It features additional examples, as well as new material on the teachings of Pope Francis. Chapters on the Ten Commandments and the teachings of Jesus have been re-worked in light of new scholarship. The book also features a new final chapter, Moral Agency, which addresses making practical decisions based on the lessons and texts from the book. Each chapter includes study questions to help readers further reflect on key themes.