Pope Francis takes part in a moment of reflection for the opening of the synodal path at the Vatican’s New Synod Hall, Oct. 9, 2021. / Screenshot from Vatican News YouTube channel.

Pope Francis’ general audience in the Paul VI Hall at the Vatican, Oct. 6, 2021. / Vatican Media.

A stained-glass window by Lucien Bégule depicting St. Irenaeus at the Church of St, Irenaeus in Lyon, France. / Gérald Gambier via Wikimedia (Public Domain).

An original manuscript from the Vatican Apostolic Library. / Screenshot from Biblioteca Apostolica Vaticana YouTube channel.