This example relieves me from the necessity of disputing further with my opponents, when they say that the Roman See and its pontiffs cannot err in the faith, from its being said to Peter, “I have prayed for thee that thy faith fail not.” Certainly by this shameful lapse he fell from the faith, and became a noted proof to posterity, that all are not Peters who succeed Peter in the episcopate; although the thing is too childish in itself to need an answer: for if they insist on applying everything that was said to Peter to the successors of Peter, it will follow, that they are all Satans,
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