What We Believe, Workbook

Dr. Marcellino D’Ambrosio (“Dr. Italy”) received his Ph.D. in historical theology from The Catholic University of America under the direction of Avery Cardinal Dulles and has had a prolific career as a Catholic author, internationally-respected speaker, pilgrimage leader, and university professor. He is the Co-founder and Director of The Crossroads Initiative, the author of five books and hundreds of articles, and a regular guest on both secular and Catholic TV and radio programs.

In 2004, Dr. D’Ambrosio co-authored the New York Times bestseller A Guide to the Passion: 100 Questions about The Passion of the Christ with Ascension founder Matt Pinto. In 2019, Dr. D’Ambrosio published the groundbreaking Bible study on the life of Jesus Christ filmed in the Holy Land, Jesus: The Way, the Truth, and the Life, presenting alongside Jeff Cavins and Dr. Edward Sri. In 2022, he became the co-author and co-presenter of What We Believe: The Beauty of the Catholic Faith, together with Dr. Andrew Swafford and Sarah Swafford, and in 2025 was announced as a co-presenter of the groundbreaking Foundations of Faith: A Journey Through the Catechism of the Catholic Church with Fr. Mike Schmitz, Jeff Cavins, and Dr. Edward Sri.

Dr. D’Ambrosio is currently teaches for the Catholic International University (formerly known as Catholic Distance University). He has previously been on faculty at the Loyola College in Maryland as well as the University of Dallas.

Dr. D’Ambrosio and his wife Susan reside in Dallas, Texas, where they frequently spend time with their many children and grandchildren.

Dr. Andrew Swafford is professor of theology at Benedictine College and a national speaker on a variety of Catholic topics including Sacred Scripture, St. John Paul II, and the moral life. Together with Dr. Marcellino D’Ambrosio, he is co-author of What We Believe: The Beauty of the Catholic Faith and co-host of Ascension’s video series under the same title, filmed at 30 holy sites in Rome. With his wife, Sarah, Dr. Swafford is also co-author of Gift and Grit: How Heroic Virtue Can Change Your Life and Relationships. He is also the general editor of, and a contributor to, Ascension’s best-selling Great Adventure Catholic Bible and the Catholic Guide to the Old and New Testaments (2 volumes).

Among Dr. Swafford’s other publications are Ascension’s Bible studies on Romans and Hebrews. Dr. Swafford holds a doctorate in Sacred Theology from the University of St. Mary of the Lake and a master’s degree in Old Testament and Semitic Languages from Trinity Evangelical Divinity School. Dr. Swafford is a member of the Society of Biblical Literature, the Academy of Catholic Theology, and is a featured fellow at the St. Paul Center for Biblical Theology. Both he and Sarah are available for speaking engagements and can be contacted via Twitter or their website, The Swaffords.

Dr. Swafford is an avid student of Brazilian Jiu Jitsu and lives with his wife Sarah and their six children in Atchison, KS.