Graham Greene’s novel, The Heart of the Matter, begins with an aphorism from Charles Péguy: “Le pécheur est au coeur même chrétienté.... Nul n’est aussi competent que le pécheur en matière de chrétienté. Nul, si ce n’est le saint.” More than any other season of the liturgical year, Lent tells us that the sinner is at the heart of Christianity. Indeed, as Péguy intimates, in the contemplation of our sin we move deeper into the richness of Christian faith than anyone else, except the saint that we hope to become on the other side of the journey. Greene’s protagonist, Henry Scobie, and the central characters and narratives of other Catholic novelists, offer us skilful guidance through that journey, teaching us how to be sinners so that we can learn to become saints.