St. Maximus the Confessor’s Letter to Marinus is a somewhat popular prooftext used by Roman Catholic Apologists in which they attempt to argue that St. Maximus was a filioquist. This video explains in detail why such an argument is untenable.
Edward Siecenski: The Filioque: History of a Doctrinal Controversy (Oxford Studies in Historical Theology)
Ivan Ostromoff and Basil Popoff: The History of the Council of Florence
About the author
David Erhan (previously known as therealMedWhite) is an Orthodox convert from Turkey who mostly focuses on Christological disputes concerning the Monophysite crisis. He's also the creator of the "History of Christian Theology" series on YouTube where he explains the theology of the great Church Fathers such as the Cappadocians, Hilary, Ambrose, Cyril, Maximus, and John of
Damascus which help reveal the true Apostolic Christianity the world has