On Small and Great Dogmatic Errors

TarasiusSt. Tarasios of Constantinople ca. 730-806

Evil is evil, especially in matters of the Church, as far as dogmas are concerned, it is all the same to err to a small degree or to a great degree, because in one case or the other the law of God is broken. (Mansi 12: 1030: Κανόνες τῆς Ζ′ Οἰκουμενικῆς Συνόδου, Κανὼν 1 [Acts of the Seventh Ecumenical Council, Act I], 1031– 1034)