Page:The Decrees of the Vatican Council.djvu/47

Rh IV Concerning the Infallible Teaching of the Roman Pontiff OREOVER, that the supreme power of teaching (magisterii) is also included in the apostolic primacy, which the Roman Pontiff, as the successor of Peter, Prince of the Apostles, possesses over the whole Church, this Holy See has always held, the perpetual practice of the Church confirms, and Œcumenical Councils also have declared, especially those in which the East with the West met in the union of faith and charity. For the Fathers of the Fourth Council of Constantinople, following in the footsteps of their predecessors, gave forth this solemn profession: "The first condition of salvation is to keep the rule of the true faith. And because the sentence of our cannot be passed by, who said, 'Thou art Peter, and upon this rock I will build My Church,' these things which have been said are proved by events, because in the Apostolic See the Catholic religion has always been kept undefiled, and her well-known doctrine has been kept holy. Desiring, therefore, not to be in the least degree separated from the faith and doctrine of this See, we hope that we may deserve to be in the one communion, which the Apostolic See preaches, in 