Chapter 31

The Councils and the Rejection of Apollinarianism — A Detailed Historical and Theological Examination

Introduction: Why a Whole Chapter on a "Dead" Heresy?

If you are reading this book in order, you have already met Apollinarius once before. Back in Chapter 12, I walked you through the heart of his teaching and the church's theological reasons for rejecting it — the soteriological logic captured in Gregory of Nazianzus's famous line, "what is not assumed is not healed."¹ So why a second chapter on the same controversy? Because there is a difference between asking why the church rejected a teaching and asking how she rejected it. The "why" is theological. The "how" is conciliar — meaning, it took place through the formal, public, canonical acts of the great gathered councils of bishops, with creeds, definitions, and anathemas as the instruments. That conciliar history is what I want us to look at carefully here.

This matters for our book's larger argument. If physicalism about Christ's human nature produces the same Christological result that Apollinarianism produced — an incomplete human nature, missing its rational soul — then we need to know what the church did with Apollinarianism. Was the rejection a one-time skirmish, soon forgotten? Or a sustained, repeated, official condemnation that became part of the binding deposit of orthodox faith? The answer, as we will see, is the second. Apollinarianism was condemned across nearly two centuries, including at three of the seven ecumenical councils. The denial of Christ's human rational soul has been definitively excluded from Christian orthodoxy — with direct consequences for any view, including modern Christian physicalism, that ends up denying Christ a human soul.²

Apollinarius Briefly Revisited: What Exactly Was Condemned?

I will not retrace Apollinarius's whole project here, since Chapter 12 covers it in depth. But for the conciliar story to make sense, you need the bare outline of what was on the table.

Apollinarius (c. 310–c. 390) was the bishop of Laodicea in Syria. He was not a fool or a villain. He was a brilliant, deeply orthodox defender of the Nicene faith, a friend of Athanasius, a tireless opponent of Arianism. His Christological problem was a real one: if Christ has a complete human nature — body, soul, and rational mind (nous, νοῦς, the Greek word for the higher reasoning faculty) — and if the Logos is a complete divine Person, do we end up with two persons in Christ, two centers of consciousness loosely glued together? That worry was shared by many in the fourth century, and it was the same worry that would later drive both Nestorius and Eutyches into different ditches.³

Apollinarius's solution was to subtract a piece of the human side. Working with a tripartite anthropology — body, lower animal soul, and rational mind — he proposed that in the Incarnation, the divine Logos took the place of Christ's human nous. Christ thus had a real human body and even a kind of lower soul for animal life functions, but His rational and willing center was simply the divine Word itself. One mind in Christ. One will. Unity preserved. Problem solved.⁴

The cost of that solution, as the orthodox bishops quickly recognized, was that Christ's humanity was no longer complete. He was a human body wired up to a divine mind. He was, as Gregory of Nyssa put it, a hybrid — not really one of us. And if He was not really one of us in His mind and will, then the most important parts of human nature — the parts that sin, the parts that need redeeming — had not been assumed at all. That is the heart of the church's theological reply, which I treat fully in Chapter 12. What I want to track here is the institutional response: how the gathered church, in council after council, said no.⁵

The First Wave of Condemnations (362–382)

The conciliar response to Apollinarianism did not begin with the great ecumenical council at Constantinople in 381. It began two decades earlier, at a smaller but pivotal gathering: the Synod of Alexandria in 362.

This synod was convened by Athanasius after his return from a third exile, and its main business was healing the rift between rival Nicene parties. But tucked into the synod's Tomus ad Antiochenos ("Letter to the Antiochenes") is one of the earliest formal Christian rejections of any teaching that would deny Christ a human soul. The letter insists that "the Saviour had a body neither without a soul, nor without sense, nor without intelligence; for it was impossible, since the Lord had become man for our sake, that his body should be without intelligence."⁶ This was 362 — a full generation before Constantinople I. The principle that Christ's body was joined to a real human soul, with real human intelligence, was already being treated as something the orthodox community must publicly affirm.

The next wave came from Rome. Pope Damasus and the Roman synods of 377, 378, and 382 issued progressively sharper condemnations of Apollinarius and his followers. The synodal letter known as Confidimus quidem (377) anathematized those who taught that "the Word of God dwelt in human flesh in place of the rational and intellectual soul (pro anima rationali et intelligibili)."⁷ Notice the precise language. The error is not vaguely "denying Christ's humanity." It is specifically the substitution of the Word for the human rational soul. That is the exact pattern that, in a different metaphysical key, modern physicalism produces — but I am getting ahead of myself.

Constantinople I (381): The Ecumenical Verdict

The First Council of Constantinople is the moment at which the church's verdict on Apollinarianism becomes the verdict of an ecumenical council — a gathering recognized as authoritative for the whole church, not just one regional patriarchate. Convened by Emperor Theodosius I, attended by about 150 bishops, it produced two things that matter for our story.

The first is the creed we now call the Nicene-Constantinopolitan Creed — the creed Christians around the world still recite on Sunday mornings. The creed itself does not name Apollinarius. But its expansion of the original Nicene creed of 325 includes a careful, deliberate description of Christ as "incarnate of the Holy Spirit and the Virgin Mary, and was made man (enanthrōpēsanta, ἐνανθρωπήσαντα)." That second word — literally "in-humaned" or "made man" — is doing real work. It is not a synonym for "took on flesh." The earlier Nicene creed of 325 had said only "was made flesh (sarkōthenta, σαρκωθέντα)." Constantinople I added "and was made man" precisely because, by 381, "made flesh" alone was no longer enough to rule out the Apollinarian reading. The council wanted a phrase that affirmed not just a body but full humanity — body and rational soul together.⁸

The second product of Constantinople I is its first canon, which lists the heresies the council formally rejects. The text reads, in Norman Tanner's standard translation: "The profession of faith of the holy fathers who gathered in Nicaea in Bithynia is not to be abrogated, but is to remain in force. Every heresy is to be anathematized, and in particular… that of the Apollinarians."⁹ That short clause — "and in particular… that of the Apollinarians" — is the formal ecumenical anathema. The council names the teaching, identifies it as a heresy, and excludes those who hold it from communion with the catholic church. This is the "how" of conciliar rejection: a creed that walls the truth in, and a canon that names the error and walls it out.

Reinforcement at Ephesus (431) and Chalcedon (451)

If Constantinople I had been the church's only word on the matter, one might still wonder whether the rejection was really settled. It wasn't a one-and-done. The fourth and fifth centuries saw the church return to the Apollinarian question several more times, and each time the answer hardened.

At the Council of Ephesus (431), the immediate target was Nestorianism, not Apollinarianism. But Cyril of Alexandria, the dominating theological voice at Ephesus, was scrupulous about insisting on the completeness of Christ's humanity. Cyril's mia physis (μία φύσις, "one nature") formula, often misread later as Monophysite, did not deny Christ a human soul; in fact, Cyril repeatedly affirmed that Christ possessed a rational soul (psychē logikē, ψυχὴ λογική) and indeed identified Christ's rational soul as the seat of His suffering — the very point Apollinarius had sought to eliminate.¹¹ When Ephesus accepted Cyril's letters as authoritative, it implicitly accepted Cyril's anti-Apollinarian commitments.

Twenty years later, Chalcedon (451) made the matter fully explicit. The Chalcedonian Definition — the most important Christological text in the history of the church — describes Jesus Christ as

"the same perfect in Godhead and the same perfect in manhood, the same truly God and truly man, of a reasonable [rational] soul and body (ek psychēs logikēs kai sōmatos, ἐκ ψυχῆς λογικῆς καὶ σώματος); consubstantial with the Father according to the Godhead, and the same consubstantial with us according to the Manhood…"¹²

Read that clause again slowly: of a rational soul and body. This is not throwaway language. The bishops at Chalcedon could have written simply "perfect in manhood." They went further. They specified what perfect manhood includes: a rational soul and a body. They did this for one reason — to slam the door on Apollinarianism, which had said you could have manhood without the rational soul. Chalcedon's answer is: no, you cannot. That phrase is, in effect, a structural anti-Apollinarian clause embedded in the very definition of orthodox Christology.¹³

Wilkinson, whose work on a "Chalcedonian anthropology" I find compelling, notices the same point. Chalcedon's definition of Christ's humanity as "a body-soul nature" is not incidental: it is structural to the council's whole achievement. The Son became a man by assuming "a body-soul nature as his own."¹⁴ Take away the soul half of that body-soul composite, and you no longer have what Chalcedon was defining.

Constantinople II (553): The Sharpest Statement

The Fifth Ecumenical Council, held at Constantinople in 553 under Emperor Justinian, is sometimes overlooked by Protestant readers because its main business — the so-called "Three Chapters" controversy — feels remote and political. But for our purposes, Constantinople II is the most important council of all, because it produced the single most explicit anti-Apollinarian anathema in the conciliar tradition.

The fourth canon (anathema) of Constantinople II reads:

"If anyone… does not confess that the union of God the Word with human flesh, possessed by a rational and intellectual soul (animatae anima rationali et intellectuali), occurred according to composition, that is, according to subsistence (kath' hypostasin), as the holy fathers have taught… let him be anathema."¹⁵

Two things are worth pausing on. First, the council does not just say "human flesh." It says "human flesh possessed by a rational and intellectual soul." The very thing Apollinarius wanted to remove, Constantinople II makes a non-negotiable component of what the Logos united Himself to. Second, the council ties this to hypostasis language — the union is "according to subsistence." The Logos is not united to flesh-in-the-abstract. He is united, in His own person, to a real concrete human nature consisting of (a) a body and (b) a rational and intellectual soul.

Pawl, working as an analytic philosopher of religion, draws the conclusion that any model of the Incarnation in which something divine — the Logos itself, or the divine nature — plays the role of Christ's soul falls under this fourth anathema, and so is "inconsistent with Conciliar Christology."¹⁶ But the same logic applies to any model in which there is no human rational soul at all — whether because the Logos has replaced it (Apollinarius) or because no such thing exists in any human being to begin with (modern physicalism). In both cases, the Word is united to a body without a rational and intellectual soul. In both cases, the fourth anathema bites.

The Theological Logic in Brief

I treat the deeper theological reasoning behind these condemnations in Chapter 12, so I will sketch it only briefly here. Five interlocking arguments drove the orthodox response.

First, Gregory of Nazianzus's famous axiom: "What is not assumed is not healed (to gar aproslēpton, atherapeuton, τὸ γὰρ ἀπρόσληπτον, ἀθεράπευτον)."¹⁷ If the Son must take on what He intends to save, and if a fallen human rational soul is the seat of sin, then the Son must take on a human rational soul. Apollinarianism breaks this link.

Second, the soteriological argument, which is the application of Gregory's axiom: the human mind and will are the primary locus of sin and ignorance and moral failure. They are precisely what most needs healing. A redemption that bypasses them is a redemption that does not reach where we actually live.

Third, the completeness argument: a "human nature" that lacks a rational soul is not a human nature at all. It is a sub-human nature — an animal nature, in Gregory of Nyssa's blunt formulation. Saying Christ became "human" while denying Him a human soul is, in this view, simply a category mistake about what humans are. Wilkinson develops this point at length in his Chalcedonian anthropology: human being is, by Chalcedon's own ontology, a body-soul nature, and to redefine it as body alone is to redefine humanity itself.¹⁸

Fourth, the agency argument: salvation in Hebrews 10 is described as the offering of an obedient human will — "Behold, I have come to do your will" (Heb 10:7, ESV). A human will is a faculty of a human soul. No soul, no human will; no human will, no human obedience; no human obedience, no salvation in the way Scripture describes it.

Fifth, what we might call the unity-by-Person argument. Apollinarius wanted to preserve the unity of Christ's person by eliminating one of His natures' core components. The orthodox bishops insisted that unity is preserved a different way: by the Person of the Logos, who unifies two complete natures in Himself. You do not need to amputate one of the natures in order to get one Christ. You need a metaphysics rich enough to allow one Person to bear two complete natures. That is precisely what conciliar Christology developed and what Loke's Kryptic Model and Pawl's analytic Christology defend in different keys today.¹⁹

The Parallel to Physicalism: A Fair Reading

Now for the question that has been hovering over this chapter from the start. Does the conciliar rejection of Apollinarianism extend, by the same logic, to modern Christian physicalism about Christ's human nature?

I want to handle this fairly, because the parallel is real but the historical situations are not identical. Let me start with what is genuinely different. Apollinarius was making a claim specifically about Christ: that the Logos replaced the rational soul in this one unique case. Christian physicalists are making a claim about all human beings: that no one has an immaterial soul, because no such thing exists. Their starting point is anthropology, not Christology. They generally believe they are affirming Christ's complete humanity by affirming His complete physical body, brain and all. They are not trying to be Apollinarian. Most of them — Murphy, Green, Corcoran, and others — would be horrified by the suggestion. They believe their position is just as committed to Christ's full humanity as any dualist's.

I take that intention seriously and I do not impute bad faith to anyone. The question I am pressing is not about intentions. It is about the structural result of the position once you carry it through to Christology.

Here is the structural parallel. The conciliar definition of "complete humanity" is not body-only. It is body-and-rational-soul. That is what Chalcedon says, in so many words. That is what Constantinople II's fourth anathema reinforces. So a view that denies Christ a rational soul — for whatever reason — falls outside the conciliar definition of "complete humanity," and Christ on that view has, in conciliar terms, an incomplete human nature. Apollinarius got there by replacing the soul with the Logos. The physicalist gets there by eliminating souls altogether and identifying Christ's human nature with a body. Different routes, same destination. And the conciliar tradition has spoken to that destination.²⁰

Farris draws out the consequence carefully in his discussion of the Apollinarian parallel. If we define a complete human nature as Chalcedon defined it — "of a rational soul and body" — then any Christology in which Christ has only a body, however that lack of soul is explained, is a Christology that conciliar orthodoxy has already excluded.²¹ The chapters in Christian Physicalism? by Loftin and Farris develop the same point in several different directions, especially as it bears on Holy Saturday and the death of Christ — issues I take up in Chapters 21 and 22.²²

A Counterargument and a Response

The strongest physicalist reply at this point is: "The councils were addressing a specific Christological error in their own time. They were not legislating about modern philosophy of mind. To take the conciliar definitions and apply them to a debate they could not have foreseen is to over-extend their authority."

I think there is something right about this objection — and something wrong. What is right is that the bishops at Chalcedon were not envisioning twenty-first-century neuroscience. Of course they weren't. What is wrong is the implication that their definitions are so context-bound that they have no implications for views the bishops did not specifically envision. The councils defined what a complete human nature is — body and rational soul. That definition is meant to govern any future Christological proposal, not just those on the table in 451 or 553. If a new view is consistent with the conciliar definition, it does not run afoul of the councils. If a new view denies it — for whatever reason — then it does. This is not anachronism. It is just the application of a definition.²³

Conclusion

So where does this leave us? The denial of Christ's human rational soul is not a peripheral controversy that the church handled awkwardly and moved on from. It is one of the most consistently and deliberately excluded errors in the entire conciliar tradition — condemned at Alexandria in 362, by Rome under Damasus in the 370s and 380s, by Constantinople I in 381 (formal ecumenical anathema), implicitly reinforced at Ephesus in 431, made structural to the very definition of the faith at Chalcedon in 451, and explicitly and powerfully reaffirmed at Constantinople II in 553. The cumulative force of this is enormous. The church was telling herself, over and over: whatever else you say about Christ, do not make Him less than fully human, and "fully human" includes a rational soul.

If that is right — and I think the conciliar texts make it as clear as anything in the history of doctrine — then Christian physicalism has a serious problem. Not because physicalists intend any of the things Apollinarius intended. They don't. But because the conciliar definition of "complete humanity" rules out any Christology that ends with Christ lacking a human rational soul, and physicalism, taken consistently, ends there. We will return to this issue in Chapters 32 (the medieval and modern history), 34 (the comprehensive case), and 35 (answering specific physicalist responses). For now, the conciliar verdict is what it is. The councils have spoken. And on this question, they spoke with one voice.