FATHERS AND DOCTORS OF THE CHURCH ON THE PAPACY
Origen - "The gates of hell shall not prevail against it.
To what does this "it" refer to? The rock upon which Christ built His Church, or the Church? ... Or are they ... one and the same thing, the rock and the Church? This, I think, is the real fact." (p. 203.)
St. Archelaus - (Quoting from the arguments against the Church of the Manichaens): "Why hast thou left us orphans, though Thou didst say, I will not leave you orphans... . Thou has deceived us! But God forbid that such should be applicable to Our Lord ... for He delayed not the fulfillment of His promises... . (p. 210-211.)
Eusebius, G.C. - The Days of Our Savior (spoken of in Psalm 71:7), "are to be understood as being from His advent, even to the consummation of the world." For the Psalmist says "'...He shall continue with the sun, and before the moon throughout all generations... .' For as long as the sun... illuminates the whole world, ...and like unto the moon enlightens the souls that are in darkness ... so is He said to abide unto generations and generations." (p. 214.)
St. Athanasius - "Therefore is the Jewish system destroyed, for it was a shadow; but that of the Church is firmly established." (On Psalm 88, 38), "The Church of Christ ... shall be ... abiding as the sun and moon...'perfect forever... ."' (p. 216.)
St. Ephrem: "The Church of Christ ... being a perfect and complete pattern of the heavenly tabernacle [will] abide forever."' (p. 220.)
St. Jerome - "...even to the end of the world, the Church may be indeed, shaken by persecutions, but never can be overthrown; be tried, not conquered... . The Lord God Almighty has promised that He will effect this; and His promise is nature's law." (p. 225.)
St. John Chrysostom - "yea, for from the day that it was spoken, even to the consummation of the world, has it remained firm and unshaken ... even unto those who shall be until the coming of Christ... . He built the Church, and no one could destroy it; He destroyed the Temple, and no one is able to build it up again." (p. 228.)
St. Augustine - "...the Catholic Church ... fights against all heresies She may fight, but cannot be defeated... . The gates of hell shall not conquer Her." (p. 239.)
St. Prosper - "...the Church ... asks to have Her days declared unto Her, that She may know that She is to endure unto the end of the world... . Let not, She says, my days be shortened, until the consummation of the world, as thou has promised; until the fullness of the Gentiles come in and all Israel be saved." (p. 241.)
Arnobius Junior, L.C. - "...for not philosophers and rhetoricians, but unlearned men and fishermen upheld of God founded a Church which He established in His sight forever." (p. 245.) (End of quotes from Msgr. Capel.)
St. Vincent of Lerins asserted that, in order to discover the teaching of the Church, the Council of Ephesus felt it was sufficient "...to show the agreement of ten fathers or principal doctors of the Church." (The Church of the Word Incarnate, p. 537.) We shall quote further below from various saints, and at least one of the doctors of the Church on this matter. While St. Vincent of Lerins requires ten fathers or doctors, Reverend J.C. Fenton writes that, for the consent of the fathers to be unanimous, "...we need not ... demand an explicit declaration on the point from every ... one of the fathers of the Church. There is such consent when at least a moral unanimity of the fathers who have actually dealt with this subject, teach the same doctrine as having been revealed by God... the apposition of one, or even of an inconsiderable number, to the teaching which is common with the rest, does not prevent the common teaching from enjoying a certain unanimity. The united voice of the fathers constitutes a real rule of faith." (The Concept of Sacred Theology, Reverend J.C. Fenton, p. 136.) So far, we have not seen one father, one doctor, or one theologian who questions the indefectibility of the Church. In fact, we find this teaching as strongly anchored in succeeding centuries as it was, indeed, already extant in the early ages of the Church.
St. Thomas of Aquinas - (The testimony of this doctor alone proves our case, since Pius XII averred that you can believe everything St. Thomas said.) "It cannot be said,"
(concerning the power of the keys), "that though He conferred this dignity on Peter, it does not pass from him to others. For it is evident that Christ so instituted His Church that it would endure to the end of the world, according to Isaias 9:7 (see quote) ... Hence, it is evident that those he appointed to the ministry then and there, were for the good of the Church, to communicate their powers to their successors until the end of time; especially since He says (Matt. 28:20): 'Behold, I am with you all days, even to the consummation of the world."' (IV Contra Gentiles, 76.)
St. John Fisher - "The faith of Peter, do not doubt it, will always abide in the succession of Peter, which is the Church." (The Vatican Council, Henry Cardinal Manning, p. 148.)
St. Edmund Campion - "...For since the Church was not to become extinct with Peter, but to endure until the end of the world, the same stability in faith was even more necessary to Peter's successors... . (The Vatican Council, p. 151.)
St. Francis de Sales - (Under the heading: That the Church Cannot Perish, he writes): "Are you ignorant that Our Lord has purchased the Church with His own Blood? - and who can take it from Him? ... He has drawn Israel out of Egypt... the desert... the Red Sea; out of so many calamities and captivities; - and we are to believe that he has let Christianity be engulfed in infidelity! ... He has so highly favored the servant who was to be driven out of the house, and he will hold the legitimate wife in no esteem! ... Oh! How vain would be the promises on promises which he has made of the perpetuity of this Church... . Say not that the good seed is destroyed or choked, for it grows even to the consummation of the world." (St. Francis de Sales Library. Vol. III, p. 58, 60.)
"The fold of Our Lord is to last till the consummation of the world, in visible unity; the unity then of external government must remain in it." 
Ibid, p. 277.)
Ibid, p. 277.)St. Bernard: "It is right that all dangers and scandals which arise in the kingdom of God, especially such as regard faith... be reported to your apostleship... for wounds inflicted on faith should be there healed, where faith cannot fail." (Letter to Innocent II, as recorded by Archbishop Francis Kenrick, The Primacy of the Apostolic See, p. 147.)
Bishops of Tarrogona to Pope Hilarius - "...we seek to benefit by the privilege of your See ... which was praised by the mouth of the apostle... and... where nothing is ordained erroneously." (Archbishop Kenrick, p. 148.)
St. Cyprian - "he turned naturally to Rome as the center of all authority, because he thought... that the Romans are 'they to whom faithlessness can have no access."' (Cardinal Merry del Val, The Truth of Papal Claims, p. 98.)
St. Ambrose - "Faith... is the foundation of the Church... for... of St. Peter's faith... was it said that the gates of hell shall not prevail against it." (Cardinal Merry de Val, p. xi., appendix.)
St. Robert Bellarmine - Commenting on Chapter V of Bellarmine's De Romano Pontifice, H.I.D. Ryder writes: "The thesis of Bellarmine's fifth chapter is this: 'the Pope cannot err... in a matter of morals'; i.e., he cannot make a law for the whole Church as would involve those who obey it in a breach of the moral law."' (Catholic Controversy, p. 171.)
St. Francis de Sales - "So when... the Church was certified that the gates of hell should not prevail against it--was it not enough to say that St. Peter, as a foundation stone of the ecclesiastical government and administration, could not be crushed and broken by infidelity or error, which is the principal gate of hell?.... For if the foundation be overthrown, the whole building will fall." (Library of St. Francis de Sales, Vol. III, p. 296-297.)
Saint Thomas Aquinas: "The sovereign is said to be ‘exempt form the law’, as to its coercive power, since, properly speaking, no man is coerced by himself, and law has no coercive power save from the authority of the sovereign. Thus then is the sovereign said to be exempt from the law, because none is competent to pass sentence upon him if he acts against the law. …" (I-II, Q96, A5)
Saint Alphonsus states: "It doesn’t matter that in past centuries some pontiff has been elected by fraud: it suffices that he has been accepted after as pope by all the Church, for this fact he has become true pontiff." (note Saint Alphonsus is talking about a man who is papabile, that is capable of being elected.)
Michael Fighting
"Michael…who standeth for…thy people," — Dan. 12:1-12
