Paul therefore, as a
faithful steward doubtless is to be regarded as approving his fidelity in his writings; for he was a steward of truth, not of falsehood. Therefore he wrote the truth when he wrote that he had seen Peter walking not uprightly, according to the truth of the gospel, and that he had withstood him to the face because he was compelling the Gentiles to live as the Jews did. And Peter himself received, with the holy and loving humility which became him, the rebuke which Paul, in the interests of truth, and with the boldness of love, administered. Therein Peter left to those that came after him an example, that, if at any time they deviated from the right path, they should not think it beneath them to accept correction from those who were their juniors,— an example more rare, and requiring greater piety, than that which Paul’s conduct on the same occasion left us, that those who are younger should have courage even to withstand their seniors if the defence of evangelical truth required it, yet in such a way as to preserve unbroken brotherly love.
Saint Augustine to Saint Jerome (405 AD) (Letter 82)