Joyce Hollyday is an author and speaker and serves as Associate Conference Minister for United Church of Christ. For fifteen years Joyce was a columnist and feature writer for Sojourners magazine. Among her many books is Clothed with the Sun: Biblical Women, Social Justice, and Us. Joyce lives in North Carolina.

Joyce Rupp is well known for her work as a writer, spiritual "midwife," and retreat and conference speaker. She has led retreats throughout North America, as well as in Europe, Asia, Africa, Australia, and New Zealand. Joyce has a B.A. in English, a M.R.E. in religious education, and a M.A. in transpersonal psychology. She is a member of the Servites (Servants of Mary) community and a volunteer for Hospice. She currently resides in Des Moines, Iowa.

Julia A. Lamm is a Professor of Theology at Georgetown University in Washington, D.C. She is an historical and systematic theologian with specializations in the doctrine of God, the doctrine of grace, and Christology; Christian mysticism and spirituality; the history of Christian thought; the relation between theology and philosophy; Julian of Norwich (1343-ca. 1416); and Friedrich Schleiermacher (1768-1834). She is a recipient of an Alexander von Humboldt Fellowship (Germany) and is founding Director of the James M. and Margaret H. Costan Lecture in Early Christianity at Georgetown.

Dr. Karen Kilby is Special Lecturer in Theology at the University of Nottingham. She is the author of Karl Rahner: Theology and Philosophy (Routledge, 2004) and has contributed articles on Rahner to Blackwell’s Companion to Modern Theology, the Oxford Companion to Christian Thought and The Modern Theologians. She holds an MA in Mathematics from Cambridge and a Ph.D. in Theology from Yale.

Karl Borromäus Adam attended the Philosophical and Theological Seminary at Regensburg and was ordained a priest in 1900. Adam then studied at the University of Munich and received his doctorate in 1904. In 1919 he became a professor at the University of Tübingen. He retired from that post in 1949. He is best known for his 1924 work, The Spirit of Catholicism. It has been widely translated, and is still influential in the work of 21st century theologians and spiritual seekers.