As a seminarian of the Archdiocese of Eger, he started his theological studies at the Theological College of Eger, which he then completed at the Pázmány Péter Academy of Theology. From 1983, as student of the Collegium Germanicum et Hungaricum he first attended the Pontifical Gregorian University, then continued his studies at the Alphonsian Academy, where he obtained a licentiate in moral theology. In 1989 he received his doctoral degree, then from 1990 he started teaching theology and served as the prefect at the Seminary of Eger; later he was appointed the docent of the Faculty of Theology of Pázmány Péter Catholic University. For two years he was the rector of the Pontifical Hungarian Ecclesiastical Institute. From 1998, he served as the secretary of the Hungarian Catholic Bishops' Conference for eight years. In 2000, he was ordained a bishop by Pope John Paul II in the St. Peter's Basilica in Rome. In 2006, Pope Benedict XVI made him the Bishop of Szombathely. He has been the President of the Hungarian Catholic Bishops' Conference since 2015. In 2016, he was appointed the Bishop of the Diocese of Győr by Pope Francis.