Dr. D'Ambrosio studied under Avery Cardinal Dulles for his Ph.D. in historical theology and taught for many years at the University of Dallas. He now directs www.crossroadsinitiative.com, which offers Catholic resources for RCIA and adult and teen faith formation, with a special emphasis on the Eucharist, the Theology of the Body, the early Church Fathers, and the Sacrament of Confirmation.