This book outlines the history, objectives, and theology behind the movement to renew Catholic worship prior to the Second Vatican Council. Readers can trace the origins of the liturgical movement in the 19th century, which sought to reclaim the Church's worship identity—an identity that had been eroded by modern individualism and rationalism. The authors also discuss the significant contributions of monasteries (such as the monastic liturgical movement) and highlight the movement's transition from the monastic setting to pastoral practice at the parish level. A central focus of the book is the necessity for the active, conscious, and full participation of the faithful in worship, rather than their remaining mere passive spectators. Furthermore, the authors explain the importance of educating and forming the laity, as well as the discussions surrounding the revision of texts and the presentation of the liturgy to ensure relevance for modern believers while respecting historical traditions. This work offers a comprehensive perspective on the Church's spiritual longing to revitalize the meaning of the sacraments and worship—a longing that laid the foundation for the liturgical renewal that would follow.