See this online text:

  • ‘Newman on Infallibility’, by Avery Dulles, S.J., Theological Studies, vol. 51, issue 3 (1990): pp. 434-449. Available in pdf format at Theological Studies.

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‘He began to teach them that the Son of Man must suffer greatly and be rejected by the elders, the chief priests, and the scribes, and be killed, and rise after three days. He spoke this openly. Then Peter took him aside and began to rebuke him. At this he turned around and, looking at his disciples, rebuked Peter and said, “Get behind me, Satan. You are thinking not as God does, but as human beings do.”‘ (St. Mark viii, 31-33, from the gospel reading for 16 September 2018)