In this volume, a noted theologian brings together an ecumenical roster of leading scholars to explore trinitarian faith as it is concretely experienced in the life of the church. Drawing upon and fostering renewed interest in trinitarian theology, the contributors—including Brian E. Daley, John Behr, and Kathleen McVey—clarify the centrality of trinitarian doctrine in salvation, worship, and life. This is the third volume in Holy Cross Studies in Patristic Theology and History, a partnership between Baker Academic and the Pappas Patristic Institute of Holy Cross Greek Orthodox School of Theology. The series is a deliberate outreach by the Orthodox community to Protestant and Catholic seminarians, pastors, and theologians.