The Sinner's Guide to the Spiritual Life: A Simple Spiritual Roadmap for Rejects, Cowards, Underdogs, and Burned-Out Catholics at the End of their Rope. Have you ever tried to grow closer to Jesus only to find you are back in the same old rut? Do you want to grow in holiness but it all seems too complicated? This book boils down the spiritual theology of the Catholic Church regarding how to grow in faith into simple principles that are accessible to all people, regardless of where they find themselves on the path to holiness.