Robin Ryan, CP, PhD is a Passionist priest and theologian who serves as Associate Professor of Systematic Theology and Director of the Master of Arts in Theology Program at Catholic Theological Union. He received his Ph.D. in systematic theology from The Catholic University of America. He is the author of numerous articles and recordings on theological and spiritual topics. He edited and contributed to the book Catholics on Call: Discerning a Life of Service in the Church (Liturgical Press, 2010). He is the author of God and the Mystery of Human Suffering: A Theological Conversation Across the Ages (Paulist Press, 2011). He recorded a series of CDs on the topic of God and the Mystery of Human Suffering for Now You Know Media. He is the author of the forthcoming book Jesus and Salvation (Liturgical Press, April 2015). He is also a contributor to and English-language editor of the forthcoming Diccionario de la Pasión (Madrid, San Pablo).