In the wake of renewed restrictions on the Traditional Latin Mass, this penetrating study examines the true nature of obedience in the life of the Church. Drawing deeply from St. Thomas Aquinas and the Church’s theological tradition, it clarifies what kind of obedience is necessary for salvation, when it is lawful, and when it may become an obstacle to the good of souls. With careful attention to history, conscience, and the limits of authority, this book equips clergy and laity alike to navigate confusion with fidelity, prudence, and unwavering devotion to what the Church has always held sacred.