Catholicism maintains that the pope is infallible, incapable of error, when he teaches a doctrine on faith or morals to the universal Church in his unique office as supreme head. When the pope asserts his official authority in matters of faith and morals to the whole church, the Holy Spirit guards him from error.

Where does it say that the pope is infallible?

The First Vatican Council in 1869-70, in its Pastor Aeternus decree, declared that the pope was infallible when he spoke “ex Cathedra” – or from the papal throne – on matters of faith and morals.

Is the Catholic Catechism infallible?

While the catechism contains the infallible doctrines proclaimed by popes and ecumenical councils in church history — called dogmas — it also presents teachings not communicated and defined in those terms. In other words, all dogmas are considered doctrines, but not all doctrines are dogmas.