132 The Faith of Our Fathers Oriental and the Western Bishops met for the purpose of reunion. The Eighth General Council, held in Constantinople in 869, contains the following solemn profession of faith: "Salvation primarily depends upon guarding the rule of right faith. And since we cannot pass over the words of our Lord Jesus Christ, who says, 'Thou art Peter, and on this rock I will build My Church,' what was said is confirmed by facts, because in the Apostolic See the Catholic religion has always been preserved immaculate, and holy doctrine has been proclaimed. Not wishing, then, to be separated from this faith and doctrine, we hope to merit to be in the one communion which the Apostolic See preaches, in which See is the full and true solidity of the Christian religion." This Council clearly declares that immaculate doctrine has always been preserved and preached in the Roman See. But how could this be said of her, if the Roman See ever fell into error, and how could that See be preserved from error, if the Roman Pontiffs presiding over it ever erred in faith? In the Second General Council of Lyons (1274), the Greek Bishops made the following profession of faith: "The holy Roman Church possesses full primacy and principality over the universal Catholic Church, which primacy, with the plenitude of power, she truly and humbly acknowledges to have received from our Lord Himself, in the person of Blessed Peter, Prince or Head of the Apostles, whose successor the Roman Pontiff is; and as the Roman See, above all others, is bound to defend the truth of faith, so, also, if any questions on faith arise, they ought [129] to be defined by her judgment." Here the Council of Lyons avows that the Roman Pontiffs have the power to determine definitely, and without appeal, any questions of faith which may arise in the Church; in other words, the Council acknowledges them to be the supreme and infallible arbiters of faith. "We define," says the Council of Florence (1439), at which also were present the Bishops of the Greek and the Latin Church,