Gerald O'Collins, SJ, (1931-2024), was an adjunct professor at Australian Catholic University and a research fellow at the University of Divinity in Melbourne. He taught at the Gregorian University in Rome for thirty-three years and was well known as a lecturer and broadcaster around the world. Fr. O'Collins has had hundreds of articles published in professional and popular journals and authored or co-authored sixty-seven books, including The Second Vatican Council: Message and Meaning (Liturgical Press, 2014).