Can an Indefectible Church Create a Defective Liturgy?

Here is the hardest question in the entire debate, stated plainly: if the Catholic Church cannot err in what she proposes for belief — if she is, as the Council of Florence and Vatican I defined, indefectible — how can her own most eminent liturgical scholars describe the 1969 reform as a rupture with tradition, a spiritual impoverishment, and a banal fabrication? Either the Church is not indefectible, or the critics are wrong, or the terms of the question need to be examined more carefully. This article argues for the third option.

What Indefectibility Actually Claims

The doctrine of indefectibility means, in its precise theological sense, that the Church will never defect from the faith Christ entrusted to her. She will not, as a whole, apostatize. She will not cease to be the Church. She will not definitively propose error in faith and morals as binding on all the faithful. The Holy Spirit, Christ promised, will guide her into all truth (John 16:13), and the gates of hell will not prevail against her (Matt. 16:18).

What indefectibility does not mean is equally important — and this is where the confusion in the liturgical debate begins:

The technical theological distinction is between indefectibilitas (indefectibility) and impeccabilitas (impeccability). The Church is indefectible; she is not impeccable. God guarantees she will not ultimately fall; he does not guarantee she will never stumble. These are categorically different claims, and conflating them is the source of most of the confusion in this debate.

What the Magisterium Actually Defines

Vatican I’s definition of papal infallibility in Pastor Aeternus (1870) is precise and limited. The Pope speaks infallibly when he speaks ex cathedra — from the chair of Peter — defining a doctrine of faith or morals to be held by the whole Church, with the explicit intention of binding the universal Church. The conditions are specific and stringent. The overwhelming majority of papal acts — encyclicals, apostolic constitutions, motu proprios, liturgical reforms, disciplinary decrees — do not meet this threshold.

The promulgation of a new Missal is a disciplinary and liturgical act, not a definition of faith or morals. It is not — and has never been claimed to be — an infallible act. Pope Paul VI was not speaking ex cathedra when he issued Missale Romanum in 1969. He was exercising his authority as supreme legislator of the Latin Church in a matter of discipline. That authority is real and binding; it is not infallible.

The implication is direct: a Catholic who holds that the 1969 reform was imprudent, harmful to faith and practice, and in tension with the organic development the Church had always maintained is not denying an article of faith. He is making a prudential judgment about a disciplinary act — the same kind of judgment Catholics have been making about papal and conciliar decisions throughout the Church’s history, including judgments later vindicated by the Church herself.

The Assessment from Within: Ratzinger

It is worth pausing on the identity of the person who made the most damaging assessment of the post-conciliar reform. Joseph Ratzinger was not a nostalgic traditionalist, a dissident, or a man hostile to authority. He was:

• A peritus (theological expert) at the Second Vatican Council, who had enthusiastically supported liturgical renewal
• Archbishop of Munich and Freising (1977–1982)
• Prefect of the Congregation for the Doctrine of the Faith (1982–2005) — the Church’s chief doctrinal officer
• Pope Benedict XVI (2005–2013), the supreme legislator of the Latin Church

This man wrote, in his preface to Klaus Gamber’s The Reform of the Roman Liturgy (1993):

And in his memoirs Milestones (1997):

This is not a fringe opinion. This is the judgment of the man who would become pope — who, when he became pope, issued Summorum Pontificum liberating the old Mass precisely because he had concluded that what had been done to it lacked proper authority and theological justification. The question this article is asking is: was Ratzinger saying the Church had defected? Of course not. He was saying the Church had made a serious prudential error. That distinction is the whole of the argument.

The Spectrum of Responses: From Orthodox Critique to Dangerous Error

Not everyone who has grappled with this question has arrived at the same conclusion. It is important — for intellectual honesty and for the reader’s own orientation — to map the full spectrum of positions, from those fully within Catholic orthodoxy to those that have departed from it.

The Resolution: What the Question Actually Requires

Let us now answer the question this article began with directly.

Can an indefectible Church create a defective liturgy? In the sense that a defective liturgy constitutes a formal proposal of heresy — no. The Novus Ordo does not formally teach heresy. Its valid celebration truly confects the Eucharist. The Church’s indefectibility is not violated by its existence.

But “defective” need not mean “heretical.” A liturgy can be defective in the way that a poorly constructed building is defective — not collapsed, still inhabitable, serving its basic function — while nonetheless being a worse building than what preceded it, and having been constructed by methods that compromised the tradition of sound building it was supposed to extend. It can be defective by omission: by the removal of prayers that encoded a theology the Church has always held, whose absence trains the faithful, over generations, to hold a different and lesser theology.

This is precisely what lex orandi, lex credendi means. The danger of the post-conciliar reform is not that it teaches heresy. The danger is that it forms heresy — slowly, generationally, through the steady attrition of sacrificial language, penitential posture, sacred mystery, and doctrinal precision from the prayers the faithful offer week after week, year after year, from childhood to death.

Ratzinger understood this clearly. His lifelong project — from the Gamber preface through The Spirit of the Liturgy through Summorum Pontificum — was not to prove the Novus Ordo heretical but to restore the theological content that the reform had attenuated. He believed — and the evidence of fifty years supports his belief — that a Church whose ordinary worship has been stripped of its sacrificial theology will, over time, produce Catholics who no longer hold the sacrificial theology the Church teaches.

That is the real answer to the question. An indefectible Church does not formally propose defective doctrine. But an indefectible Church can, through imprudent governance, allow a defective liturgy to form defective habits of belief in her faithful. And the guarantee of indefectibility means that she will, eventually, correct this — not that she will never need to.

Signs of Correction: The Story Is Not Over

The story being told in this track of articles has no settled ending. The post-conciliar reform was implemented in haste. Its liturgical results were contested from the beginning by Cardinals, theologians, and ordinary Catholics of unimpeachable fidelity. The man who would become Benedict XVI described it as a fabrication. The man who became Benedict XVI then spent his papacy working to restore what had been lost — first through Summorum Pontificum’s liberation of the old Mass, then through the reform of the reform (requiring “for many,” promoting Gregorian chant, celebrating his own Masses with increasing traditional elements), then through his retirement address acknowledging that the work was unfinished.

Pope Francis’s Traditionis Custodes (2021) restricted the old Mass again. But even Francis’s action acknowledged something the previous generation of progressives had denied: that there is a real community of the faithful for whom the Traditional Latin Mass is not nostalgia but living prayer, not a museum piece but a sacramental home. The ongoing tension — between those who regard the reform as a gift to be protected and those who regard it as an error to be corrected — is itself a sign that the question has not been resolved by mere administrative authority.

With the election of Pope Leo XIV and his subsequent movement toward greater access to the Traditional Latin Mass, the pendulum has moved again. Whether it will move far enough, and whether the deeper theological questions about the 1969 reform will ever receive the formal examination they deserve, remains to be seen. What can be said with confidence is this: the indefectible Church has not said her last word on this question. And that is, in the end, a reason for hope rather than despair.