Robert Royal is the author of The Catholic Martyrs of the Twentieth Century and Dante Alighieri. He is editor in chief of The Catholic Thing, an online publication he founded with Michael Novak; the president of the Faith and Reason Institute, based in Washington, DC; the graduate dean of Catholic Distance University; and a member of the board of directors of the Catholic Family and Human Rights Institute. He has taught at Brown University, Rhode Island College, and the Catholic University of America. He lives in Washington, DC.

Robert J. Wicks, is a professor at Loyola College in Baltimore, a professional mentor, and a retired clinical psychologist. He is the author of more than thirty books.

The Cuban-American Roberto Goizueta is presently a noted professor in the theology department at Boston College. He is past-president of the Society of Catholic Theology in the United States and of the Academy of Hispanic Catholic Theologians of the United States. Dr. Goizueta has published over 50 academic articles, and this book has received an award from the Association of Catholic Press. This work and the content of his unique Hispano/Latino theology are presented for the first time to the Spanish speaking world.

Rodney A. Howsare, PhD, is a professor of theology at DeSales University and the author of Hans Urs von Balthasar and Protestantism. He lives in Allentown, Pennsylvania. Larry S. Chapp, PhD, is a professor of theology at DeSales University, the author of The God Who Speaks: Hans Urs von Balthasar's Theology of Revelation, and a contributor to The Cambridge Companion to Hans Urs von Balthasar. He lives in Coopersburg, Pennsylvania.

Óscar Andrés Rodríguez Maradiaga, SDB, is a Honduran cardinal of the Catholic Church. He is the archbishop of Tegucigalpa, the president of Caritas Internationalist, and the former president of the Latin American Episcopal Conference. He worked as the Vatican's representative to the World Bank and the International Monetary Fund and has spoken out on social justice and inequality for many decades.

Richard Rohr is a well-known lecturer who founded the Center for Action and Contemplation. He has been a featured essayist on the NPR program This I Believe, was a guest on the radio show Oprah and Friends, and appeared in the documentary ONE, featuring spiritual teachers from around the world. He is a regular contributor to Sojourners and Tikkun magazines, and he is the author of numerous bestselling books, including Adam's Return, The Enneagram, Everything Belongs, and The Naked Now. He lives in Albuquerque, New Mexico.

Roland Meynet is presently professor of Biblical theology at the Pontifical Gregorian University in Rome and was the former director of its Department of Biblical Theology. He is a founding member and currently the secretary of the International Society for the Studies of Biblical and Semitic Rhetoric and is one of the most important and renowned promoters of the rhetorical method as it applies to Biblical and Semitic texts.

Romano Guardini was a Catholic priest, author and academic.

Father Haney was the executive editor for The Catholic Witness, the diocesan newspaper for Harrisburg, Pennsylvania.