Book excerpt: Christians are identified by their participation in liturgy. In this primer, Catherine Vincie introduces readers to current liturgical theology by providing them with the foundational themes of the field. She explains that liturgy draws us into the paschal mystery of Jesus Christ, that it should create a space in which we attempt to name toward God by employing an abundance of metaphors and images, and that the sacraments are communicated and understood through the use of symbols. Vincie is grounded in the liturgical reforms of the Second Vatican Council. As such, Celebrating Divine Mystery seeks to draw readers into full, conscious, and active participation" in the liturgy by informing them about recent scholarship and challenging them to enter the divine mystery as informed and engaged participants. Catherine Vincie, RSHM, PhD, is professor of sacramental and liturgical theology at the Aquinas Institute of Theology in St. Louis. She is also author of The Role of the Assembly in Christian Initiation and many articles on initiation, Eucharist, and liturgy and justice. As a practicing liturgical musician, she is also interested in the role of the arts in past and current liturgical celebration. "