My research focuses on the area at the borderline of philosophy and theology, asking questions such as: What is the proper role of philosophical thinking in theology?; What is the nature of interpretation?; How is truth to be understood?; How can human language be applied to God?; May we speak of a perduring identity throughout history and temporality? My teaching seeks to communicate to students the richness of the Catholic intellectual tradition while highlighting the intense commitment of Catholicism to ecumenical and inter-religious dialogue, and, indeed, to fruitful and charitable exchanges with all men and women, regardless of belief.
- S.T.D., The Catholic University of America
- S.T.L., The Catholic University of America
- S.T.B., Gregorian University (Rome)
- B.A., Seton Hall University
- The Unchanging Truth of God?: Crucial Philosophical Issues for Theology (Washington, DC: The Catholic University of America Press, 2022).
- The Disputed Teachings of Vatican II: Continuity and Reversal in Catholic Doctrine (Eerdmans, 2018)
- Evangelicals and Catholics Together at Twenty: Vital Statements on Contested Topics (Grand Rapids: Brazos, 2015), co-edited with T. George.
- "Philosophia Obscurans? Six Theses on the Proper Relationship between Theology and Philosophy," Nova et Vetera, English Edition, 12(2), 349-94, March 2014
- Vincent of Lerins and the Development of Christian Doctrine (Grand Rapids: Baker Academic, 2013)
- Vattimo and Theology (T & T Clark International, 2009)
- Foundations of Systematic Theology (T & T Clark International, 2005)
- Named theological advisor to the benevolent organization Opus Bono Sacerdotii (July 2018)
- Researcher of the Year Award, School of Theology (2004, 2009, 2016, and 2018).
- Awarded the Paradosis Center for Theology and Scripture Book Prize of 2014 for the volume Vincent of Lerins and the Development of Christian Doctrine.
- Elected as theological co-chairman of the bi-lateral ecumenical group, Evangelicals and Catholics Together (ECT) (2009).
- Invited as Fellow of the Center of Theological Inquiry, Princeton, NJ (2002).
- Received Lilly Foundation and Association of Theological Schools Research Grants (several from 1989 onward).