‍The pope can change Catholic doctrines whenever he wants

  Gary Hoge  ·  November  6, 2026

‍No, they don’t. In fact, the Catholic Church explicitly teaches that the pope has no authority to change doctrines that have been definitively established by the Church.

‍The First Vatican Council declared in 1870:

‍For the Holy Spirit was promised to the successors of Peter not so that they might, by his revelation, make known some new doctrine, but that, by his assistance, they might religiously guard and faithfully expound the revelation or deposit of faith transmitted by the apostles.¹

‍In other words, the pope’s responsibility is to preserve and explain the faith handed down from the apostles, not to replace it with something new.

‍The Second Vatican Council reaffirmed this principle:

‍This teaching office is not above the word of God, but serves it, teaching only what has been handed on.²

‍That doesn’t mean the Church’s understanding of doctrine can’t develop. It can, and it has. But there’s an important difference between developing a doctrine and changing it into something contradictory.

‍Consider the doctrine of the Trinity. Christians believed in the Father, Son, and Holy Spirit long before the Church formally defined the doctrine in the fourth century. The definition didn’t introduce a new belief. It clarified and expressed more precisely what Christians had already believed.

‍The same principle applies to other Catholic doctrines. As new questions and controversies arise, the Church may explain an established teaching more fully, clarify its implications, or correct misunderstandings. But it cannot reverse a doctrine that has been definitively taught as a matter of faith.

‍Of course, popes can revise disciplinary rules, modify Church practices, and make prudential judgments that later popes may reverse. The requirement that Latin-rite priests ordinarily remain unmarried, for example, is a discipline, not an unchangeable doctrine.

‍And popes can make mistakes. Catholics don’t believe that every papal statement, decision, or theological opinion is infallible.

‍The pope is the guardian of the Church’s faith, not its owner. He has the authority to teach and defend what the Church has received from the apostles, but not to replace it with something else.

‍__________

^‍1 First Vatican Council, Pastor Aeternus, chapter 4 (July 18, 1870). Read the document.

^‍2 Second Vatican Council, Dei Verbum (Dogmatic Constitution on Divine Revelation), 10, November 18, 1965. The Council teaches that the Church’s teaching authority serves the Word of God rather than standing above it. Vatican website.