Peter himself knew nothing of such infallibility. The Lord, even in the very context of his statement about the founding of his church, had to rebuke Peter, the very disciple to whom the Father Himself had revealed a truth about the Son of God, when he later spoke of himself “not the things that be of God, but those that be of men” (Matt 16:16–23)A.
No wonder that later Peter, when writing from the apocalyptic “Babylon,” or Rome, to “the strangers scattered abroad,” was careful to make his exhortation very plain: “If any man speak, let him speak as the oracles of God” (1 Pet 4:11)A.
We set out below, in contrast to such clear words of Scripture, the Papal Bull on Infallibility, a decree of Pius IX set forth at the First Vatican Council, 1869–70, as a dogma to be received by all the faithful:
The Doctrine Of Papal Infallibility: Vatican Council, Session Iv. Cap. 4 . . . We (i.e. Pope Pius IX), agreeing faithfully to the tradition received from the beginning of the Christian faith — with a view to the glory of our Divine Saviour, the exaltation of the Catholic religion, and the safety of Christian peoples (the Sacred Council approving), teach and define as a dogma divinely revealed: That the Roman Pontiff, when he speaks ex cathedra (that is, when — fulfilling the office of Pastor and Teacher of all Christians — on his supreme Apostolical authority, he defines a doctrine concerning faith or morals to be held by the Universal Church), through the divine assistance promised him in blessed Peter, is endowed with that infallibility, with which the Divine Redeemer has willed that His Church — in defining doctrine concerning faith or morals — should be equipped: And therefore, that such definitions of the Roman Pontiff of these not by virtue of the consent of the Church — are irreformable. If anyone shall presume (which God forbid!) to contradict this our definition: let him be anathema. (The Christadelphian, 1992, P. 290)
The Origin of the Organic World – Part One