教皇不可謬説
Over the next several years, Overbeck developed liturgies for administering other sacraments and for praying a Divine Office. Overbeck attempted to reach Old Catholics to his scheme since they had recently schismed from the Roman Catholic Church over First Vatican Council's dogmatic definition of Papal infallibility, though to little avail. During this time, he continued to criticize Roman Catholics and Anglicans as well as those Western converts to Orthodoxy who utilized the Byzantine Rite.