教皇不可謬説
The Council also asserted papal primacy. In July 1870, it issued the Dogmatic constitution "Pastor aeternus", defining four doctrines of the Catholic faith: the apostolic primacy conferred on Peter, the perpetuity of this primacy in the Roman pontiffs, the meaning and power of the papal primacy, and Papal infallibility. [W]e teach and declare that, by divine ordinance, the Roman Church possesses a pre-eminence of ordinary power over every other Church, and that this jurisdictional power of the Roman Pontiff is both episcopal and immediate. Both clergy and faithful, of whatever rite and dignity, both singly and collectively, are bound to submit to this power by the duty of hierarchical subordination and true obedience, and this not only in matters concerning faith and morals, but also in those which regard the discipline and government of the Church throughout the world."