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How is papal infallibility different from the idea that the church is indefectible?

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Papal infallibility and the indefectibility of the church are related but distinct doctrines within Roman Catholic theology.

  • Papal infallibility refers to the specific belief that the pope, when acting as the supreme teacher and under certain conditions, cannot err in definitive teachings on matters of faith or morals. This doctrine was formally defined as dogma in 1870 at the First Vatican Council. It is based on the understanding that the pope, as a successor to St. Peter, is divinely protected from error in these specific pronouncements.123

  • Indefectibility of the church, on the other hand, is a broader concept. It asserts that the church, through the assistance of the Holy Spirit, is assured of its perseverance and faithfulness to Christ's teachings until the end of time. This means the church as a whole will not fundamentally fail in its mission or its core doctrines, but it does not mean that individual members, or even popes in all instances, are incapable of error.3

In essence, papal infallibility is a specific aspect of the church's larger, indefectible nature, focusing on the pope's role as a supreme teacher.3