Why I'm Catholic

This is the first in a series of posts exploring why I converted to Catholicism. Future posts will address tradition, the origins of the Bible, and the question of authority. But I'm starting here because this is where it started for me.

I didn't become Catholic because I was persuaded by the Church Fathers, though I find them compelling. I didn't convert because of the beauty of the liturgy, though it moves me deeply. I didn't even convert because I became convinced of specifically Catholic doctrines like the real presence or the Marian dogmas, though I hold all of them with conviction.

I became Catholic because of a conviction about Jesus Christ. Specifically, a conviction about what it means for Him to be Lord.

That conviction, once I followed it honestly, left me with nowhere else to go.

The Body of Christ Is Not a Metaphor

Paul's letters return again and again to the image of the Church as the body of Christ. It is one of the most familiar ideas in Christianity, so familiar that it's easy to pass over without noticing what he's actually claiming.

To the Ephesians he writes that God "put all things under his feet and gave him as head over all things to the church, which is his body, the fullness of him who fills all in all" (Eph 1:22–23). To the Colossians: "He is the head of the body, the church. He is the beginning, the firstborn from the dead, that in everything he might be preeminent" (Col 1:18). Again to the Ephesians: "Christ is the head of the church, his body, and is himself its Savior" (Eph 5:23).

Paul is not merely using decorative language here. He is not reaching for a convenient analogy to describe how Christians relate to each other. He is making an ontological claim. The Church is the body of Christ in a real sense. Christ is its head in a real sense. The relationship between head and body is not optional, not loose, not metaphorical. It is constitutive of what the Church is.

Over the course of my journey as this became a truth that took root in me, it surfaced a question that I could not get around.

Is Christ Divided?

Paul asks this question himself, and he clearly expects the answer to be obvious. "Is Christ divided?" (1 Cor 1:13). Of course not. An undivided head cannot govern a fragmented body. If Christ is one, then His body must be one. Not in some invisible, spiritual sense that conveniently allows for forty thousand denominations to all claim membership. One body. Visibly, identifiably one.

He makes the point explicitly: "There is one body and one Spirit, just as you were called to the one hope that belongs to your call, one Lord, one faith, one baptism, one God and Father of all" (Eph 4:4–6). The repetition is striking. One body. One Spirit. One Lord. One faith. One baptism. Paul is not describing an aspiration. He is describing a reality. The unity of the Church is grounded in the unity of God Himself.

This created a problem for me as a Protestant, even as a confessional, sacramental Lutheran. It was not a minor tension that could be resolved with a clever distinction, nor an intellectual conundrum that could be hand-waved away. It was a real problem. The Protestant world is defined by fragmentation. It began with fragmentation (the Reformation itself was a splintering) and it has continued to fragment ever since. If you had told me I was part of the one body of Christ while I was sitting in a Baptist church that had split from another Baptist church over a disagreement about worship style, I would have needed to explain what "one" means in a way that Paul clearly did not intend. And when this occurred to me, I was sitting in one of several Lutheran bodies, each claiming a more faithful expression than the others. That's a tiny church.

The Gates of Hell Will Not Prevail

The fragmentation problem is serious enough on its own. But there is another layer to it that I found even harder to escape.

In Matthew 16:18, Christ makes a promise: "On this rock I will build my church, and the gates of hell shall not prevail against it." At the end of Matthew's Gospel, after the resurrection, He says to His disciples: "All authority in heaven and on earth has been given to me. Go therefore and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, teaching them to observe all that I have commanded you. And behold, I am with you always, to the end of the age" (Matt 28:18–20).

These are not conditional promises. They are not qualified or time-limited. Christ does not say the gates of hell will not prevail unless things go badly in the fourth century. He does not say He will be with His disciples always, unless the Church falls into corruption and needs to be rebuilt from scratch by reformers fifteen centuries later. He did not say He will be with His disciples always from the point where America is born onward. He speaks absolutely. The gates of hell will not prevail. I am with you always. To the end of the age. The King of the Universe says this.

If these promises mean anything, they mean the Church cannot fail. It cannot apostatize. It cannot be overcome. Not because the people in it are sinless, but because the one who sustains it has all authority in heaven and on earth. The standard Protestant escape from this is the doctrine of the invisible Church: the true Church is a spiritual reality known only to God, scattered across denominations, and its unity is real even when its visible expressions contradict each other. This is an elegant solution, and it fails for a specific reason. It relocates the Church into a place where Christ's promises cannot be tested, and therefore cannot be kept or broken in any meaningful sense. An invisible body cannot have the gates of hell prevail against it, because it has no gates. It cannot be apostatized from, because it has no visible boundary to leave. The doctrine protects Christ's promises by emptying them of content. Paul does not write to an invisible body. He writes to the Corinthians, the Ephesians, the Romans, visible communities with bishops and elders and Eucharists and disciplinary structures, communities that could be found, addressed, corrected. The body he describes is the body Christ promised to keep. If that body has fractured beyond recognition, the promise has failed. If the promise has not failed, that body is still here.

What This Means

Here is where the argument became unavoidable for me.

If Christ is the head of the Church, and the Church is His body, then the body must be one, because Christ is one. If the gates of hell will not prevail against it, then the Church must be intact, because Christ promised it would be. If He is with His people always, to the end of the age, then there has never been a moment in history when the Church ceased to exist or lost its way so thoroughly that it needed to be replaced.

A significant point for me: this is not an argument about ecclesiology; it is an argument about Christology. It is a claim about who Christ is and whether His power is sufficient to keep His promises.

To believe that the Church fractured beyond recognition, or apostatized, or lost the Gospel and had to be recovered by later reformers, is to believe, whether one realizes it or not, that Christ either made promises He could not keep, or made promises He chose not to keep. I could not accept either option. Not because of what it said about the Church, but because of what it said about Him. This gradual realization led me to this: the Reformation, taken seriously, reveals as much about who it believes Christ is not as about who it believes He is. And it implies a Christ who could not keep His own promises.

I want to be clear: this is a destination I arrived at without interacting with a Catholic apologist or resource. It was theological conviction formed by what I believed about God from the Protestant Bible.

Where Is the Body?

Once I accepted that the Church must be one and must be continuous, the question was no longer why be Catholic. The question was where is the body?

That question has a surprisingly straightforward answer if you are willing to follow it. Which community can trace an unbroken line from the apostles to the present? Which community has maintained visible unity, not perfect unity of opinion, not the absence of internal disagreement, but the structural and sacramental continuity that Paul describes? Which community was already there in the second century, the fifth century, the tenth century, the fifteenth century, and is still there now?

I am not going to press that historical argument in this post. That is for a future installment in this series. Here I only want to make the point that the question itself arises from Christology, not from church history. I did not start by comparing churches and selecting the most convincing one. I started with a conviction about Christ, that He is Lord, that His promises hold, that His body is one and intact, and then asked where that conviction could land.

It could only land in one place.

I'm Catholic as a Matter of Christology

I want to say this as plainly as I can, because it is the heart of everything else I believe about the Church.

I am Catholic as a matter of Christology. If Christ is Lord of all, and the gates of hell will not prevail against His Church, then it is a matter of faith in Christ that His Church is intact. Not faith in the Church for the Church's sake. Faith in Him. Trust that He meant what He said and has the authority to accomplish it.

To believe otherwise is to diminish Him. It is to say that His authority extends to heaven but not to history. That He can save a soul but cannot preserve a community. That His promises are true in the abstract but have failed in practice. I could not say any of those things and still call Him Lord in the way that Scripture demands.

My conversion was not primarily a decision about which denomination had the best arguments. In fact, my conversion was a surrender of intellect to faith, even though the Catholic Church provided a fertile ground for intellectual exploration. But primarily it was the recognition that if I took Christ seriously, seriously as Lord, seriously as the head of a body, seriously as the one who holds all authority and keeps all promises, then the Church He built must still be here, and it must still be one.

Everything else I came to accept in RCIA, the sacraments, the Marian doctrines, the authority of the magisterium, the communion of saints, I accepted because I had already accepted this. Once I believed that Christ's Church was intact, I was prepared to trust what that Church teaches, even in the areas I had not yet fully worked through on my own. That trust was not credulity. It was the logical consequence of a Christological conviction I could not escape.

He is the head. The body is one. The gates of hell have not prevailed.

That is why I am Catholic.