Joan Ohanneson was an author, a producer, a teacher, and an international speaker who lectured extensively on Hildegard of Bingen. She was known for her contributions in the areas of spirituality, sexuality, and women’s gifts.

Johann Adam Möhler, a Roman Catholic theologian and Church historian.

Johann Baptist Metz (born 1928) is a Catholic theologian. He is Ordinary Professor of Fundamental Theology, Emeritus, at Westphalian Wilhelms University in Münster, Germany. A student of Karl Rahner, he broke with Rahner's transcendental theology in a turn to a theology rooted in praxis. Metz is at the center of a school of political theology that strongly influenced Liberation Theology. Metz is one of the most influential post-Vatican II German theologians. His thought turns around fundamental attention to the suffering of others. The key categories of his theology are memory,...

John A. Sanford was an Episcopal priest and Jungian analyst. His wrote many books on biblical interpretation, dreams, the afterlife, mystical Christianity, ministry, and other topics that relate to spirituality and psychology.

John E. Thiel is Professor of Religious Studies at Fairfield University. His other books include Imagination and Authority: Theological Authorship in the Modern Tradition, Nonfoundationalism, and Senses of Tradition: Community and Development in Catholic Faith. Twice a recipient of fellowships from the National Endowment for the Humanities, Dr. Thiel is a member of the American Academy of Religion, the Catholic Theological Society of America, and the American Theological Society.

John Garvey is president of the Catholic University of America. He was dean of Boston College Law school from 1999-2010 and is author or coauthor of many award-winning books. Garvey earned his J.D. in 1974 at Harvard Law School, where he served as treasurer of the Harvard Law Review. He received an A.B. in 1970 from the University of Notre Dame.

John J. Dietzen is a retired Catholic pastor whose career has spanned 40 years in pastoral ministry, marriage and family education, and journalism. His weekly question and answer column is syndicated nationally in nearly 40 Catholic newspapers, and he also writes a weekly column for the Peoria Journal-Star. He teaches philosophy and conducts parish missions and retreats for men, women, and couples and serves as episcopal vicar for retired priests in his diocese. He lives in Peoria, Illinois.