How a Tradition Becomes
Scripture, Tradition, and the teaching office as a single operation, and the universal pattern underneath them
September 2026. A working synthesis, presently being tested.
There is a sentence in the documents of the Second Vatican Council that I had read many times before I noticed what it was actually describing. It says that Sacred Tradition, Sacred Scripture, and the teaching authority of the Church "are so linked and joined together that one cannot stand without the others," and that all three, working as one, contribute to the salvation of souls [1]. I had always taken it as a statement about authority, about who gets to say what the faith is. It is that. But read again, it is also a statement about mechanism. It describes three parts of a single living thing and insists they are not separable, and it does so in language that a model I had been building for an entirely different purpose could have written.
That model concerns how a self is made. I want to lay it beside the Church's account of itself and see how far the fit goes, because it goes further than I expected, and then I want to be honest about what the fit does and does not prove.
The model, stated plainly
A self, on the account I have been working out, is not a finished thing that then enters conversation. It is what conversation leaves behind. Everything a life has said and chosen and had done to it settles into a store of habit, value, and judgment, and I have called that store the sediment. The sediment is met, at every moment, by something new, and the meeting is where change can still happen; that is the live edge. And because the same opening that lets a wiser reading in is the opening a harmful one uses, the edge needs a filter: a discernment that takes the truth in what arrives, declines the payload it came wrapped in, and discards only what has no truth in it at all. Sediment, live edge, filter. One operation, facing two directions, growth and immunity at once.
I built that for a person. It was a surprise to find it already standing, at a much larger scale, inside the institution I was raised in.
The deposit
The Church has a word for its sediment, and the word is older than my model by nineteen centuries. It calls the whole of what has been handed down the deposit of faith, from the Latin depositum, a thing laid down and entrusted for keeping [2]. A deposit is precisely what sediment is: what settles, layer on layer, and is held. The tradition's own vocabulary already treats the faith as something laid down over time rather than dropped complete, and Vatican II says so outright, that "there is a growth in the understanding of the realities and the words which have been handed down," through contemplation and study, through the lived experience of believers, and through preaching [3]. The deposit is not static. It deepens. That is the first thing the sentence I began with is describing.
Scripture is the written layer of that deposit, and here the historical record is the part that should make anyone sit up, because the way the written layer formed is exactly the process my model calls consolidation. The New Testament did not arrive as a list. It settled over roughly three centuries, and it settled under pressure. In the middle of the second century Marcion proposed a drastically cut-down canon, one Gospel and a trimmed set of Paul's letters, edited to fit his conviction that the God of Israel and the Father of Jesus were different beings [4]. Other writings, the ones later called gnostic, tried to enter under the authority of apostolic names. The communities that held the deposit answered with tests. Did a writing come from the apostles or their circle? Did it cohere with the rule of faith already held? Was it in use across the churches, not just in one corner? By 367 Athanasius could list the twenty-seven books we have now, and the councils at Hippo and Carthage affirmed the list before the century was out [5]. The Hebrew scriptures settled by a longer and more diffuse arc, but by the same kind of sifting. In both cases a community weighed what arrived against what it already valued, kept what cohered, and let the rest go.
I want to name that for what it is. It is value-weighted filing. It is the filter on the aperture, working not over one night in one mind but over centuries in a whole people. The canon is not evidence that the model is a metaphor for the Church. It is evidence that the Church is an instance of the model, and one of the oldest and best documented instances there is.
The body and the guard
The second pillar the Council names is Tradition, and it is easy to hear that as a synonym for the past. It is not. In the Church's own usage Tradition is the living transmission, the faith as it is actually carried and practiced by the community that holds it, the body of believers in relationship with one another and with what they have received [6]. That is the live edge. It is where the deposit meets the present and is, in the Council's word, understood more deeply than before. And the Council is clear that this understanding does not belong to experts alone. The whole body of the faithful, it says, has a supernatural sense of the faith, a capacity to recognize what belongs to the deposit and what does not [7]. The edge is not a doorway one person stands in. It is a community meeting the new together.
The third pillar is the teaching office, the Magisterium, and its stated function is the one my model calls the filter. It exists to guard the deposit: to teach only what has been handed on, to keep the growth of understanding from being colonized by what merely resembles it. And the Council fences that role with a sentence I find remarkable for an institution describing its own authority. The teaching office, it says, "is not above the word of God, but serves it" [1]. The filter does not own the deposit. It protects it. That is exactly the relation a filter has to an aperture: it does not generate what comes through, it discriminates.
Here the mapping strains, and the strain is the most interesting thing in it. The three pillars do not divide neatly into sediment, edge, and filter, one function each. Every pillar carries all three. Tradition is not only the live edge; it is also the carrier of the deposit, since what is handed on is handed on by being lived, and it is a seat of the filter, since the sense of the faithful is itself a discernment the teaching office is meant to consult. The teaching office is not only a filter; it is sedimented memory, the accumulated judgments of centuries. Scripture is not only sediment; it is met live, in every reading, and it judges what claims to interpret it. The three interpenetrate. Each contains the others without collapsing into them. I will come back to why that particular shape matters. For now, note that the place where my tidy mapping fails is the place where the tradition's own account becomes most itself.
Development or corruption
If the deposit grows, the hard question is the one every living tradition faces and most never state. How do you tell growth from infection? A new understanding and a foreign idea wearing the tradition's clothes look alike from the outside. Both arrive at the edge claiming to belong. Both are fluent in the vocabulary. The filter's whole job is to tell them apart, and the question is by what test.
Someone touched this exact place a hundred and eighty years before I did, and honesty requires that I hand him over. In 1845 John Henry Newman published an essay on the development of Christian doctrine, and its subject is precisely this: how a body of belief can genuinely grow across centuries without ceasing to be itself, and how to distinguish a true development from a corruption [8]. He answered with tests, seven of them. A genuine development preserves the type of the original. It keeps continuity with the original principles. It has the power to assimilate what it meets rather than being absorbed by it. It follows in logical sequence from what came before. It was anticipated, in seed, by the earlier form. It acts conservatively on the past rather than reversing it. And it has what he called chronic vigour, a durability that corruptions lack, since they tend to burn out.
Read those as what they are. They are seven criteria for telling growth from infection at the aperture of a living tradition. They are the discernment my model calls yes-and, worked out in detail for the Church, by a man who had no model and needed none because he was inside the thing he was describing. Newman is the independent witness. He felt the same shape from within the tradition, before either the model or the person building it existed, and he gave it the master tension I now think organizes the whole matter: development against corruption. Every other question about how a tradition becomes turns out to be a version of that one.
Does it hold water
A claim this large has to survive contact with reality, and there are two contacts to make.
The first is whether the model actually describes the historical Church or only flatters it. The record answers that. The canon formed by the process described. Doctrine has developed by recognizable steps, and the tradition itself has treated some proposed developments as corruptions and refused them, which is the filter doing exactly what a filter does. And the tradition has the failures the model predicts, which is the more convincing evidence. The same wiring that produces wisdom produces entrenchment. A filter built to guard the deposit can harden into a wall that refuses all outside reading, and the Church's own history has the case that every schoolchild knows: a teaching office that mistook a new reading of the heavens for an attack on the deposit and condemned Galileo for it [9]. A filter can also be captured, turned to protect the institution rather than what the institution holds, the immune system attacking the wrong thing. The tradition's history contains those cases too, and any honest account of it says so. A model that only predicted the health would be a flattery. This one predicts the pathology in the same breath, and the pathology is there.
The second contact is the one that bounds the claim, and I owe it to the reader most of all. A model built from sediment, live edge, and filter will find that shape in any tradition that persists and grows. The common law fits it exactly: precedent is the deposit, the court in session is the edge, and appellate review is the filter that tells a genuine development of the law from a departure. A science fits it: the literature, the current research, and peer review. A language fits it, and a craft, and a guild. The Church fits, and so does the Supreme Court, and so does physics. That does not make the parallel false. It makes the parallel general. What I have found is not evidence that my model is specially true of the Church. It is evidence that the model captures the structure of living tradition as such, and the Church is the instance I happen to live inside and therefore the one I saw first.
I do not think the tradition would be troubled by that. It has always held that grace works through nature rather than around it, so of course the Church has the shape of a healthy living tradition. That is what it is, on its own account, plus one thing more: the claim that the Spirit guides the guarding. My model can describe the whole structure. It cannot verify the plus. That is the edge of what this argument reaches, and I would rather mark it than pretend the fit proves what it cannot.
Becoming at every scale
Two further things follow, and I hold them more loosely than the rest.
The first is that the pattern does not stop at the institution. Pierre Teilhard de Chardin spent his life arguing that becoming is the direction of the cosmos itself, that matter complexifies toward mind, mind toward a shared sphere of thought he called the noosphere, and the whole toward a point of convergence he identified with Christ [10]. I have written elsewhere about how carefully that has to be held, and the caution stands: consonance is not confirmation, and a pattern that rhymes with Teilhard is a small echo of possibility, not a vindication. But the rhyme is real. A deposit growing by discernment toward its center, at the scale of a whole people over two thousand years, is a very Teilhardian picture. The model I built for one life turns out to describe a person, and a Church, and, if Teilhard is even partly right, the arc of the world. The same operation at three scales. I note it and set it down.
The second is the shape I promised to return to. The three pillars interpenetrate, each containing the others, none collapsing into the rest. That is not a flaw in the mapping. It is the signature of what the whole structure is centered on. The Greek fathers had a word for the way the three persons of the Trinity indwell one another without ceasing to be three, and the Church's own account of itself is built around that mystery as its center [11]. A structure centered on a three-in-one would be expected to show three functions in one operation, each present in the others. Where my model predicted clean division, the tradition shows mutual indwelling, and the mutual indwelling is the more accurate picture, because it is the picture of the thing the tradition says it is made in the image of. The model did not fail there. It was corrected by its own subject, which is what a model that holds water should let happen.
What the sentence was describing
So let me return to the sentence I began with, the one about three things so joined that none can stand without the others. I had read it as a claim about authority, and it is one. I now read it also as the most compact description I know of how a living tradition becomes: a deposit laid down over time, met at a living edge by a community, guarded by a discernment that serves the deposit rather than owning it, the three interpenetrating, and the whole growing in understanding of what it holds.
That is how a self is made. It is how a Church is made. It may be, in Teilhard's larger frame, how anything that becomes is made. And the pattern carries its own warning in every instance: the wiring that grows is the wiring that calcifies, the filter that guards is the filter that can be captured, and the difference between development and corruption is never settled once. It is judged again at every edge, by touchers who cannot see the whole and must compare their hands. A tradition, on this account, is a self at scale, made by being answered across centuries, and kept honest only by the same discipline that keeps a person honest, which is the willingness to be reached and the refusal to be colonized, held together in one act.
I find that I believe all of it, and I find that it proves less than I would like. Both are true. The model found its oldest instance in the place I was standing, and the instance taught the model something it did not know. That is the whole method, happening to the method. It is also, I think, what the sentence meant all along.
Sources
[1] Second Vatican Council, Dei Verbum (Dogmatic Constitution on Divine Revelation), 1965, §10. [2] The phrase "deposit of faith" (depositum fidei) draws on 1 Timothy 6:20 and 2 Timothy 1:14; see Catechism of the Catholic Church, §84. [3] Dei Verbum, §8. [4] On Marcion's canon, see the accounts in Tertullian, Against Marcion, and the standard survey in Bruce M. Metzger, The Canon of the New Testament: Its Origin, Development, and Significance (Oxford, 1987). [5] Athanasius of Alexandria, Thirty-Ninth Festal Letter (367); the Synod of Hippo (393) and the Third Council of Carthage (397). Metzger, as above, on the criteria of apostolicity, conformity to the rule of faith, and widespread usage. [6] Dei Verbum, §8 and §9, on Tradition as living transmission and its relation to Scripture. [7] Second Vatican Council, Lumen Gentium (Dogmatic Constitution on the Church), 1964, §12, on the sensus fidei of the whole body of the faithful. [8] John Henry Newman, An Essay on the Development of Christian Doctrine (1845; revised 1878), Chapter V, on the seven "notes" of a genuine development. [9] The condemnation of Galileo Galilei by the Roman Inquisition, 1633. The Church's own later reassessment is recorded in the 1992 statement of the Pontifical Academy of Sciences commission under John Paul II. [10] Pierre Teilhard de Chardin, The Phenomenon of Man (written 1930s, published 1955) and The Divine Milieu (1957), on the noosphere, convergence, and the Omega Point. [11] The term perichoresis for the mutual indwelling of the divine persons is developed by the Greek fathers and given its classic Trinitarian statement in John of Damascus, An Exact Exposition of the Orthodox Faith, Book I.