He later studied Arts at University College Dublin (UCD) and graduated with a BA in 1946; he was awarded an MA the following year. Between 1947 and 1951, he studied theology at St Patrick's College, Maynooth for a Bachelor of Divinity. He continued his studies at the Pontifical University of Leuven, Belgium, where he was awarded a doctorate in Philosophy in 1953. In 1981 he was awarded a D.Litt by the National University of Ireland.
