Chapter 22

The Death of Christ and the Dissolution of the Hypostatic Union

Introduction: What Happens to the Incarnation When Jesus Dies?

Here we arrive at one of the most serious problems that physicalism faces. In the previous chapter, we looked at Holy Saturday — the day between Christ's death and His resurrection — and saw how physicalism struggles to account for the Incarnation during that mysterious period. Now we need to dig even deeper. We need to ask a more precise and more devastating question: What happens to the hypostatic union — the very union of divine and human natures that makes the Incarnation what it is — when Jesus dies on the cross?

This is not a minor, technical detail for professional theologians to argue about. This goes to the very heart of what Christians believe about salvation. If the Incarnation — the union of God and humanity in one Person — was broken at the cross, then we have a Christological catastrophe on our hands. The one who died on the cross would not be the God-man. The saving power of that death would be called into question. And the creedal confession that Christ "was crucified, died, and was buried" would lose its meaning, because the "Christ" to whom these things happened would no longer be the divine-human Person that the creeds describe.

My thesis in this chapter is straightforward: if physicalism is true — if human beings are purely physical organisms with no immaterial soul — then the death of Christ necessarily dissolved the hypostatic union. There would have been no immaterial human soul to maintain the union after the body ceased to function. The Incarnation would have been interrupted, broken, or ended at the cross. And that is a result that no orthodox Christian should be willing to accept.

On substance dualism, by contrast, the hypostatic union survives Christ's death intact. The Son of God remains united to both His human soul (which is alive and active in the intermediate state) and to His human body (which lies in the tomb). The union is strained — the human nature is in a state of separation, body from soul — but it is not dissolved. The soul provides the continuity that keeps the Incarnation going through the triduum mortis (the three days between death and resurrection).

This chapter deepens the argument of Chapter 21 by focusing specifically on the metaphysics — the underlying structure and reality — of the hypostatic union and what happens to it at death. Let me walk you through it step by step.

What Is the Hypostatic Union?

Before we can ask what happens to the hypostatic union at death, we need to be crystal clear about what the hypostatic union is. The term comes from the Greek word hypostasis (ὑπόστασις), which means "person" or "individual subsistence." The hypostatic union is the union of two complete natures — a divine nature and a human nature — in one Person, the Person of the eternal Son of God, the Second Person of the Trinity.¹

The Council of Chalcedon in AD 451 gave us the classic definition. The bishops at Chalcedon declared that Jesus Christ is "acknowledged in two natures, without confusion, without change, without division, without separation." Those four famous negative adverbs — the "four fences" of Chalcedon, as they are sometimes called — protect the mystery of the Incarnation from errors on all sides.²

For our purposes, the two most important fences are "without division" and "without separation." These mean that the two natures of Christ cannot be pulled apart. They are united in one Person, and that union holds. It is not a temporary arrangement. It is not a partnership that can be dissolved. The divine nature and the human nature are joined together in the Person of the Son, and they remain joined.

Now, what does the human nature in this union consist of? The Council of Chalcedon itself tells us. The Chalcedonian definition describes Christ as "truly man, of a reasonable [rational] soul and body." Christ's human nature, in other words, is made up of two components: a rational soul and a body. This is critically important. The council did not say Christ was "truly man, of a body." It said "of a rational soul and body." And as we saw in Chapter 12, this language was deliberately chosen to exclude Apollinarianism — the heresy that denied Christ had a complete human mind or soul.³

So the hypostatic union is the union of the divine nature with the human nature, and the human nature consists of a rational soul and a body. This gives us the traditional "three-part" Christology: the divine nature, the human soul, and the human body, all united in the one Person of the Son.⁴

With this in mind, we can now ask the crucial question: What happens to this union when Jesus dies?

Death on Dualism: The Union Strained but Not Broken

On substance dualism — the view that I hold and the view that the councils presuppose — death is the separation of the soul from the body. When Jesus dies on the cross, His human soul separates from His human body. His body is laid in the tomb. His soul goes to be active in the realm of the dead (as we will explore in Chapter 23). But here is the key point: both the soul and the body remain united to the Person of the Son.

Think of it this way. Before death, the Son of God is united to a complete human nature — body and soul together. At death, the body and soul are separated from each other. But neither one is separated from the Son. The Son remains united to the human soul, which is alive and conscious. The Son remains united to the human body, which lies in the tomb. The hypostatic union is strained — human nature is now in an abnormal condition, split into its two components — but it is not dissolved. The Incarnation continues.

This is exactly what the great Church Fathers taught. Thomas Aquinas, the towering medieval theologian, addressed this question directly. Aquinas argued that at Christ's death, the soul was separated from the body, but the divine Person remained united to both. The Word of God was not separated from either the body or the soul during the triduum. The union of the divine nature with the body continued, which is why Christ's body did not see corruption (Acts 2:31). And the union of the divine nature with the soul continued, which is why Christ was able to descend to the dead as a conscious, active agent.⁵

John of Damascus, the great eighth-century theologian who synthesized the patristic tradition, made the same point in his Exact Exposition of the Orthodox Faith. He taught that although the body and soul were separated at Christ's death, the hypostasis — the Person — of the Word held both together. The Word did not withdraw from either. The soul descended to Hades. The body remained in the tomb. But both remained hypostatically united to the divine Logos.⁶

This is a beautiful and coherent picture. Death does real damage — it tears body and soul apart. But the divine Person holds both together. The Incarnation is not interrupted. The Son of God never ceases to be incarnate. He is the God-man even in death — the God-man whose body lies in a tomb and whose soul is at work among the dead.

And notice how the soul plays an absolutely essential role here. Without the soul, there is nothing to survive death, nothing to maintain the continuity of the human nature, nothing for the Son to remain united to after the body dies. The soul is the bridge that keeps the hypostatic union intact through death. Remove the soul — as physicalism does — and the bridge collapses.

Death on Physicalism: The Union Dissolved

Now let us ask the same question on physicalism. What happens to the hypostatic union when Jesus dies, if physicalism is true?

On physicalism, human nature is entirely physical. There is no immaterial soul. A human being is a physical organism — a body, a brain, a collection of biological systems. The "human nature" that the Son assumed at the Incarnation, on the physicalist view, just is the physical body of Jesus. There is nothing else to it. No soul. No immaterial component. Just a body.

When that body dies, what is left? A corpse. The biological systems have shut down. The brain has ceased to function. The heart has stopped beating. The body lies lifeless on the cross and is then placed in the tomb. And there is no soul to survive this event — no immaterial part of Christ's human nature that continues to exist after the body dies.

So what has happened to the hypostatic union? The Son was united to a human nature. That human nature was a body. The body is now dead. Is the Son still united to a dead body? Is the Second Person of the Trinity hypostatically united to a corpse?

This question creates a devastating dilemma for the physicalist. Let me lay out both horns of it carefully.

Horn One: The Son Is United to a Corpse

Perhaps the physicalist will say: "Yes, the Son remains united to the dead body. The hypostatic union continues. It is just that the human nature is now in the state of death — the body is no longer functioning."

But this creates serious problems. A corpse is not a human nature. A corpse is not a person. A corpse does not have a mind, a will, consciousness, emotions, or any of the properties that the councils insisted Christ's human nature must have. The Council of Chalcedon said Christ's human nature includes "a rational soul." A corpse has no rational soul — and on physicalism, it never had one to begin with. A corpse has no rationality at all. It is dead biological tissue undergoing the process of decay.

If the Son is hypostatically united to a corpse, then during the triduum mortis, the Son is not united to a human nature. He is united to a lifeless object. But the Incarnation is the union of the divine nature with a human nature — not with an inanimate object. A corpse is no more a human nature than a rock or a tree is. To say that the Son is incarnate in a corpse is to empty the word "incarnate" of all its meaning.⁷

Furthermore, this view creates an insuperable problem for the communicatio idiomatum — the "communication of attributes," the doctrine that says the properties of each nature can be predicated of the one Person. During Christ's earthly life, we can say, "God suffered" and "God hungered" because the Son's human nature experienced suffering and hunger, and those properties are communicated to the Person. But during the triduum, on the physicalist view, what properties are being communicated from the "human nature" (which is now a corpse) to the Person? "God is decomposing"? "God is undergoing rigor mortis"? These predications are not merely strange; they are theologically grotesque. They turn the communicatio idiomatum into an absurdity.⁸

Horn Two: The Son Is No Longer United to a Human Nature

The alternative for the physicalist is to say: "No, the Son is no longer united to the dead body. When Jesus died, the hypostatic union was dissolved. The Son is no longer incarnate during the triduum mortis. He is once again the Second Person of the Trinity without a human nature."

This option at least has the virtue of metaphysical honesty. It acknowledges what seems obvious: a corpse is not a person, not a nature, and not a suitable partner for hypostatic union. But the theological cost of this admission is staggering.

If the hypostatic union was dissolved at the cross, then the Incarnation ended at the cross. The Son ceased to be the God-man. He returned, as it were, to His pre-Incarnation state — the divine Son without a human nature. The permanent Incarnation is denied. The Chalcedonian affirmation that the natures are united "without separation" is violated. And the entire theological significance of Christ's death is thrown into question.

Consider: if the Incarnation ended at the cross, then in what sense did the God-man die? On this view, what happened at the cross was that a human organism died and the divine Son "departed" — He was no longer incarnate. This is not the death of the God-man; it is the dissolution of the God-man. The God-man ceases to exist. What is left is a dead human body (no longer united to the Son) and the divine Son (no longer incarnate). These are two separate things, not one Person.⁹

This directly contradicts the creedal confession. The Nicene Creed says of the Son: "For our sake he was crucified under Pontius Pilate; he suffered and was buried." The subject of these sentences is the Son — the divine Person. He was crucified. He suffered. He was buried. These things happened to Him, the one divine Person, through His human nature. But if the hypostatic union was dissolved at the moment of death, then the Son was not buried. A body was buried — a body that was no longer united to the Son. The creed becomes false.¹⁰

The Patristic Tradition: The Son Remained United to Both Body and Soul

The patristic tradition — the writings of the early Church Fathers — overwhelmingly affirms that the Son remained united to both the body and the soul of Christ during the triduum. This was not a matter of speculation or personal opinion. It was considered a necessary implication of the Incarnation itself.

Athanasius of Alexandria, the great champion of Nicene orthodoxy, taught that the Word's union with the body was not severed at death. The body lay in the tomb, but it was still the body of the Word. This is why the body did not see corruption — because the incorruptible Word was still united to it.¹¹

Gregory of Nazianzus, whose famous axiom "what is not assumed is not healed" (treated at length in Chapter 12) drove the condemnation of Apollinarianism, also insisted on the continuity of the hypostatic union through death. For Gregory, the whole point of the Incarnation was that the Son assumed a complete human nature — body and soul — and never let go of it. If the Son released the human nature at death, then death itself would not have been conquered from within. Christ conquered death precisely by passing through it while remaining the God-man, not by temporarily ceasing to be incarnate.¹²

Cyril of Alexandria, whose christological formulations provided the theological backbone for the Council of Ephesus (431), emphatically taught that the hypostatic union was not dissolved at the cross. In his Third Letter to Nestorius, which was ratified by the Council of Ephesus, Cyril used the analogy of soul and body to describe the union: "He made His own the way we may say that the soul of man does in his own body." Just as the soul's departure from the body does not mean the soul ceases to exist, Christ's death did not mean the union was destroyed. For Cyril, the Word "suffered in the flesh" (1 Peter 4:1), and this predication is true precisely because the union persisted even through the moment of death.¹³

As Timothy Pawl has noted in his philosophical analysis of conciliar Christology, the Chalcedonian definition's insistence on "without separation" carries enormous implications. Pawl observes that once the human nature is hypostatized — that is, once it has been taken into the Person of the Son — it remains impersoned by the Logos. The union is not something that can be undone by events within the created order, including death. The human nature does not have an independent hypostasis of its own; it subsists in the hypostasis of the Son. For the union to be dissolved, the Son would have to actively abandon His own human nature — and the conciliar tradition says this did not happen and could not happen.¹⁴

Thomas Aquinas pulled all of these threads together with characteristic precision. In the Summa Theologica, Aquinas argued that although Christ's body and soul were separated at death, neither was separated from the Word. He wrote that Christ descended to the dead with His soul, so that "the saving Redeemer of the world was conscious of His imminent victory over death and actively sought the lost." His body lay in the tomb, but it was still the body of the Word — and it was for this reason that the Father did not allow it to see corruption (Psalm 16:10; Acts 2:31). The hypostatic union, Aquinas argued, was not a union that could be broken by death, because it was a union constituted by the divine Person, not by the natural processes of the body.¹⁵

Every one of these theologians presupposes a dualist anthropology. Every one of them assumes that Christ has a human soul that survives death and remains united to the Word. None of them could have maintained their position on a physicalist anthropology. On physicalism, there is no soul to descend to the dead, no soul to remain united to the Word, no immaterial component to bridge the gap between death and resurrection. The patristic consensus on the continuity of the hypostatic union is built on dualism. Remove dualism, and the consensus crumbles.

The "Two Sons" Worry Revisited

The dissolution of the hypostatic union at Christ's death creates another serious problem, one that has been identified by the philosopher R. T. Mullins in his important essay in Christian Physicalism? — a problem Mullins calls the "Two Sons Worry."¹⁶

The Two Sons Worry is an ancient concern in Christology. It goes all the way back to the early Church debates about Nestorianism — the heresy that divided Christ into two persons. The worry is simple: if there are two centers of consciousness, two complete agents, two subjects of experience in Christ, then there are effectively two persons — two "sons." This is the heresy that the Council of Ephesus (431) condemned and that the subsequent councils repeatedly excluded.

Now, how does this apply to the physicalist's situation at the death of Christ? Mullins argues that physicalism generates a version of the Two Sons Worry precisely at the point of death and resurrection. Here is why.

If the hypostatic union is dissolved at the cross — if the Son ceases to be incarnate when the body dies — then the pre-death Jesus and the post-resurrection Jesus are, in some sense, two different "incarnations." The first Incarnation ended at the cross. The second Incarnation began at the resurrection, when the Son was (presumably) reunited with a glorified body. But are these the same Incarnation? Is the risen Christ the same God-man as the crucified Christ?¹⁷

On dualism, this is not a problem. The soul provides the continuity. The same human soul that was united to the Son at the Incarnation, the same soul that animated Jesus' body during His earthly life, the same soul that separated from the body at death, the same soul that descended to the dead — that same soul was reunited with the glorified body at the resurrection. The identity is continuous. There is one Incarnation, not two.

But on physicalism, there is no soul to provide this continuity. The body died. The body was transformed at the resurrection. The "human nature" — which on physicalism just is the body — ceased to function at death and was somehow reconstituted at the resurrection. But what guarantees that this is the same Incarnation? What makes the risen Christ the same God-man as the one who was crucified? There is nothing — no immaterial substance, no soul, no continuous subject — to bridge the gap.

Mullins develops this argument further by noting that physicalism also runs into the anhypostasia/enhypostasia distinction — a technical but crucial distinction developed after the Council of Chalcedon. The distinction works like this: Christ's human nature is anhypostatic, meaning it has no independent hypostasis (person) of its own; and it is enhypostatic, meaning it finds its personal existence in the hypostasis of the Son. In simpler language: Christ's human nature does not exist as a separate person alongside the Son. It exists in and through the Person of the Son.¹⁸

Mullins argues that physicalism violates this distinction. On physicalism, a human person is identical to a human body. A complete human person is a living human body. But if that is the case, then the body of Jesus could, in principle, exist without the Incarnation. If that body existed without being assumed by the Son, it would be a complete human person on its own. This means the human nature of Christ, on physicalism, does not satisfy the anhypostatic requirement — it could have been a person in its own right. And this brings the physicalist right back into the Two Sons Worry.¹⁹

By contrast, Mullins notes that Andrew Loke's Divine Preconscious Model provides the dualist with a clear way to escape the Two Sons Worry. On Loke's model, the Son has a single stream of consciousness — a genuinely human conscious experience — with divine attributes operating at the preconscious level. There is only one center of consciousness, one person, one subject of experience. The human nature of Christ, on Loke's model, would not be a complete human person without the Incarnation, because the human preconscious of the Son only exists because the Son divided His mind for the purposes of becoming human. This human preconscious cannot exist apart from the Son. Thus, the anhypostasia requirement is satisfied.²⁰

I find Mullins's argument deeply persuasive. Physicalism does not have a clean way to avoid the Two Sons Worry — and the problem becomes especially acute at the point of Christ's death, when the physicalist must either admit that the Incarnation was dissolved (creating a gap that threatens to split Christ into "two incarnations") or insist that the Son was united to a corpse (which is metaphysically incoherent).

The Theological Consequences of Dissolution

Let us now spell out in detail the theological consequences that follow if the hypostatic union was dissolved at the cross. These are devastating, and I believe they should make any Christian physicalist pause before pressing forward with their position.

1. Christ's Death Was Not the Death of the God-Man

If the hypostatic union was dissolved at the moment of death, then what died on the cross was not the God-man. What died was a human organism that had been temporarily united to the divine Son. At the moment of death, the union ended, and what was left was (a) a dead body, no longer incarnate, and (b) the divine Son, no longer united to a human nature. The death of Christ, on this view, is the death of a body, not the death of a Person. And if the Person did not die — if the God-man did not die — then the salvific significance of the cross is radically diminished.

Classic atonement theology depends on the claim that it was the God-man who died for us. The infinite worth of Christ's sacrificial death comes from the fact that the one who died was both God and man. A merely human death, even a supremely noble one, cannot atone for the sins of the world. It is the union of deity and humanity in the one Person that gives Christ's death its infinite, redemptive value. If the union was dissolved at the moment of death, then the death was not the death of the God-man — it was the death of a human organism. And the divine Son simply "stepped away," like a passenger leaving a sinking ship.²¹

2. "God Died for Us" Becomes Incoherent

Closely related to the first point: one of the most powerful and emotionally stirring claims of the Christian faith is that "God died for us." The apostle Paul tells the Ephesian elders to "care for the church of God, which he obtained with his own blood" (Acts 20:28, ESV). Peter writes that we are redeemed "with the precious blood of Christ, like that of a lamb without blemish or spot" (1 Peter 1:19, ESV). The early Church celebrated what they called the "theopaschite formula" — the claim that "one of the Trinity suffered in the flesh." The Fifth Ecumenical Council (Constantinople II, 553) affirmed this formula explicitly.²²

But on physicalism, if the hypostatic union was dissolved at the cross, then God did not die. What happened was that a human organism died, and the divine Person ceased to be incarnate. The blood that was shed was not, in any meaningful sense, "God's own blood" — because at the moment of death, the union was broken, and the blood was just the blood of a dead organism, no longer united to the divine Person.

Now, a physicalist might respond: "The union was intact during the process of dying. It was only dissolved at the moment of death. So we can still say that God suffered and bled, even if the union was broken at the final moment." But this is not very satisfying. If the union was dissolving precisely as Christ died, then the death itself — the climactic moment of the entire Passion — was the moment when the God-man ceased to exist. The climax of the Christian drama is not the sacrificial death of the God-man; it is the disintegration of the God-man. That is a very different story from the one the New Testament tells.

3. The Creedal Confession Becomes Problematic

The Nicene Creed says of the Son: "For our sake he was crucified under Pontius Pilate; he suffered and was buried; and on the third day he rose again." The subject throughout is "he" — the Son, the Second Person of the Trinity. He was crucified. He suffered. He was buried. He rose again. The creed treats this as a continuous narrative about a single Person who passes through all these events.

But on the physicalist view, the "he" who was buried was not the Son. The Son had ceased to be incarnate. What was buried was a body — the same body that had been united to the Son — but now separated from the Son. And the "he" who rose again was ... what? A new incarnation? A re-incarnation? The Son reunited with a transformed body? But this creates a gap in the narrative. Between "was buried" and "rose again," the Son was not incarnate. There was no God-man. The creedal "he" has no continuous referent during the triduum.²³

On dualism, this problem does not arise. The "he" who was crucified, who suffered, who was buried, and who rose again is the same Person — the Son, who remained united to His human soul throughout the entire sequence. The soul descended to the dead; the body lay in the tomb; the Person of the Son held both together. When the body was raised and glorified, and the soul was reunited with it, the same continuous Person emerged from the tomb as the one who had been placed in it. The creed's narrative is coherent.

4. The Communicatio Idiomatum Collapses

The communicatio idiomatum — the "communication of attributes" — is the principle that allows us to predicate the properties of each nature to the one Person of Christ. Because the divine nature and the human nature are united in one Person, we can truthfully say: "The Son of God suffered" (predicating a human property to the divine Person) and "This man is omnipotent" (predicating a divine property to the human subject). The communicatio idiomatum is not a mere rhetorical device. It is grounded in the metaphysical reality of the hypostatic union. The predications are true because the union is real.²⁴

As Timothy Pawl has carefully analyzed in his In Defense of Conciliar Christology, the transfer of predicates from a nature to the Person works through what he calls "Typical Dependence" — a predicate is apt of the Person if it is the kind of predicate that is typically true of a person in virtue of having a nature of that kind. This is why "Christ suffered" is true: suffering is the kind of thing that is typically true of a person who has a human nature.²⁵

But if the hypostatic union is dissolved at death, then during the triduum, there is no union — and therefore no communicatio. The properties of the "human nature" (which is now a corpse, on physicalism) can no longer be predicated of the divine Person. "Christ was dead" becomes a meaningless or false statement, because "Christ" — the divine-human Person — no longer exists during the triduum. There is only the dead body (with no divine Person united to it) and the divine Son (with no human nature).

Michael Wilkinson, in his important work Crowned with Glory and Honor, makes the closely related point that the communicatio idiomatum depends directly on the subsistence of the Person in both natures. As he explains, the human attributes belong to the Person of the Son because the Son personally subsists in the human nature. If the Son is no longer subsisting in the human nature — because the human nature has been reduced to a corpse and the union dissolved — then the communication of attributes breaks down entirely. There is no Person-in-nature subsistence to ground the predications.²⁶

5. The Descent to the Dead Becomes Impossible

Scripture and the creedal tradition affirm that Christ was active during the triduum — descending to the dead, proclaiming to imprisoned spirits, and being present with the repentant thief "in paradise" (Luke 23:43). As we will examine in much greater detail in Chapter 23, passages such as 1 Peter 3:18–20, 1 Peter 4:6, Ephesians 4:8–10, and Acts 2:27, 31 all attest to Christ's post-mortem activity. The Apostles' Creed affirms that Christ "descended into hell" (descendit ad inferos).²⁷

On physicalism, there is no Christ to descend anywhere during the triduum. The body is in the tomb. The divine Son is not incarnate. There is no conscious, active, incarnate Person who can go and proclaim to the spirits in prison. The descent to the dead becomes either a metaphor with no literal content or an impossibility. As Charles Taliaferro has argued in his essay in Christian Physicalism?, dualism is in a significantly better position to account for the descent, because the dualist can identify a conscious subject — Christ's human soul, still united to the divine Person — who actually goes to the realm of the dead and is actively at work there.²⁸

I will treat the descent passages in full depth in Chapter 23, so I will not reproduce the entire exegetical argument here. But the point for our present purposes is clear: if the hypostatic union was dissolved at the cross, then there is no incarnate Christ to carry out the descent. The entire descent tradition — scriptural, creedal, and patristic — presupposes that Christ remained the God-man during the triduum. Physicalism makes this impossible.

Engaging the Physicalist Response: Is the Body Enough?

At this point, a thoughtful physicalist might push back in several ways. I want to engage these responses fairly and show why I believe they ultimately fail.

Response 1: "The Son's union with the body is sufficient"

A physicalist might argue that the Son can remain united to the dead body during the triduum, and that this is sufficient to maintain the Incarnation. The body, even in death, is still the body that the Son assumed. It is still "His" body. The union has not been dissolved; it has merely entered a new phase — the phase of death.

I respect this attempt, but I do not think it succeeds. As I argued above, a corpse is not a human nature. The councils defined Christ's human nature as consisting of "a rational soul and body." A corpse has neither rationality nor a soul. It is dead tissue. To say that the Son is incarnate in a corpse is to stretch the word "incarnate" beyond any recognizable meaning.

Moreover, this response creates the problem that Charles Taliaferro identified in his analysis in Christian Physicalism? — the "Corpse Objection." If a person is identical to their body (as physicalism claims), then when they die, their body should cease to be a person. But the body persists as a corpse. So either the person persists as a corpse (which is absurd — corpses are not persons), or the corpse is a new substance (as the hylemorphic animalist Patrick Toner has argued). Neither option is comfortable for the physicalist who wants to maintain the hypostatic union through death.²⁹

If we follow Toner's hylemorphic animalism, then at death, the living human body ceases to exist and a new substance — the corpse — comes into being. This means that the "human nature" the Son assumed has ceased to exist. The corpse is a different thing from the living body. The Son is now united to ... what? A new substance that is not the human nature He assumed? This is not the continuation of the Incarnation; it is the end of the Incarnation and the beginning of something else entirely.

Response 2: "God can maintain the union by divine fiat"

Another physicalist response might be: "God is omnipotent. He can maintain the hypostatic union through death by an act of divine will, even without a soul to serve as the bridge."

This response appeals to mystery and divine power. And I certainly affirm that God is omnipotent and can do things beyond our comprehension. But there is a difference between mystery and incoherence. We should not appeal to mystery when the real problem is that our position leads to logical contradiction.

The problem is not whether God has the power to maintain the union; the problem is what the union is when there is nothing left to be united to. On physicalism, the "human nature" is the body. The body is dead. If the physicalist says that God maintains the union with the dead body, we are back to the corpse problem. If the physicalist says that God maintains the union with something other than the body — but there is nothing other than the body on physicalism — then we are appealing to something that physicalism denies exists.

In other words, the physicalist's appeal to divine omnipotence tacitly admits that physicalism does not have the metaphysical resources to maintain the hypostatic union through death. It is precisely the absence of an immaterial soul that creates the problem. And no amount of divine power can make a logically incoherent scenario coherent. God can do all things, but as even Aquinas observed, God cannot make contradictory states of affairs simultaneously true. A "hypostatic union with nothing" is not something that divine omnipotence can create, because it is not a coherent concept.

Response 3: "The Incarnation is a mystery beyond our comprehension"

Finally, some physicalists may retreat to the claim that the Incarnation is a mystery — an article of faith, not an object of philosophical analysis — and that we should not expect to be able to trace the metaphysics of the hypostatic union through events like death. The Incarnation defies human categories, and we should be content to say that God somehow maintained the union in a way we cannot understand.

I want to be sensitive to this response, because the Incarnation is indeed a profound mystery. The Council of Chalcedon itself declared that the mode of the union is "ineffable" — beyond what words can capture. I do not pretend to have the Incarnation figured out. But there is a crucial difference between affirming a mystery and hiding behind one.

As Jason McMartin has argued in his analysis of Holy Saturday in Christian Physicalism?, we should not "punt to mystery on first down." While we should not expect all our questions to be answered, we also should not use the label "mystery" to excuse our position from the burden of coherence. When a position generates clear logical problems — like the dissolution of the hypostatic union at death — we should take those problems seriously rather than simply waving them away by saying, "It's a mystery."³⁰

McMartin is right that physicalist models require increasingly complex and ad hoc mechanisms to explain the theological principles connected to Christ's intermediate state on Holy Saturday. At some point, the accumulation of difficulties becomes evidence that the underlying anthropology — physicalism — is the wrong framework. The much simpler and more coherent explanation is that Christ has a human soul, that this soul survived death, and that the hypostatic union was maintained by the Son's continued union with the soul. Dualism provides a natural, straightforward, and theologically rich account. Physicalism does not.

The Christological Significance of Christ's Death: Scripture and the Soul

Having laid out the philosophical and theological arguments, I want to turn briefly to the biblical witness concerning Christ's death and show how it consistently presupposes a dualist framework.

We begin with Jesus' own words on the cross. In Luke 23:46, Jesus cried out: "Father, into your hands I commit my spirit!" The Greek word here is pneuma (πνεῦμα), which means "spirit." Jesus is committing something — His spirit, His immaterial self — into the Father's hands. This makes no sense on physicalism. On physicalism, there is no "spirit" to commit. When the body dies, everything dies. There is nothing to hand over to the Father. But on dualism, Jesus is entrusting His immaterial soul/spirit to the Father's care, confident that it will survive the death of the body. His spirit departs the body, but it is received by the Father. The hymostatic union continues because the Son — united to this spirit — is held in the Father's hands.³¹

Similarly, in Matthew 27:50, we read that Jesus "yielded up his spirit" (aphēken to pneuma, ἀφῆκεν τὸ πνεῦμα). The language of "yielding up" implies a separation — the spirit leaving the body. This is the language of dualism, not physicalism. Something departs from the body at death. That "something" is the spirit — the immaterial component of Christ's human nature. As we argued in Chapter 8, this language is deeply significant for understanding the inner life and death of Christ. The death event is described in terms that presuppose a separation of body and spirit, exactly as substance dualism holds.

Peter's sermon at Pentecost provides perhaps the most explicit statement. In Acts 2:27, Peter quotes Psalm 16:10: "For you will not abandon my soul [psychē, ψυχή] to Hades, nor let your Holy One see corruption." Peter then applies this directly to Christ in Acts 2:31: "He foresaw and spoke about the resurrection of the Christ, that he was not abandoned to Hades, nor did his flesh see corruption" (ESV). Notice the parallelism: Christ's psychē was in Hades, and His flesh (sarx, σάρξ) was in the tomb. These are presented as two distinct realities — the soul in one location, the body in another. On physicalism, Christ has no psychē to be in Hades. And if there is no psychē in Hades, then there is no Christ in Hades — only a corpse in a tomb.³²

The significance of this passage for our argument is hard to overstate. Peter is not engaging in philosophical speculation. He is proclaiming the gospel. He is explaining the death and resurrection of Jesus to a Jewish audience. And his explanation depends on a body-soul distinction. Christ's soul was in Hades; Christ's body was in the tomb. Both remained united to the divine Person. And because God did not "abandon" the soul to Hades, and because the body did not "see corruption," the resurrection was possible — the soul was reunited with the body, now glorified, and the full human nature was restored.

On physicalism, Peter's proclamation falls apart. There is no soul to be in Hades. There is no conscious subject to be "not abandoned." There is only a corpse that was, we are told, somehow reconstituted into a living body at the resurrection. But Peter does not describe the resurrection as a reconstitution or a re-creation. He describes it as God not abandoning the soul — which implies that the soul was somewhere, alive and active, and that God brought it back to the body.

Jesus' promise to the thief on the cross — "Truly, I say to you, today you will be with me in paradise" (Luke 23:43, ESV) — likewise presupposes that Christ was somewhere, conscious and present, on the day of His death. "Today" is emphatic: not at the resurrection, not at some future point, but today — the very day that both of them would die. On physicalism, there was no Jesus to be "with" the thief that day. The body was in the tomb. There was no soul. There was no one in paradise. The promise becomes empty. As I argued in Chapter 3, this passage is one of the strongest biblical testimonies to the conscious intermediate state — and Christ's own participation in it.³³

The Argument from Oliver Crisp: The Incarnation and Krypsis

Oliver Crisp, in his important work Divinity and Humanity: The Incarnation Reconsidered, provides a philosophical analysis that is highly relevant to our discussion. Crisp notes that any adequate Christology must account for the persistence of the hypostatic union through the various stages of Christ's existence — including death. He examines both kenotic and kryptic approaches to the Incarnation and notes that the kryptic model (the model I favor, as laid out in Chapter 17) has a significant advantage precisely at the point of Christ's death.³⁴

On the kryptic model, Christ's divine attributes — omniscience, omnipotence, omnipresence — were not surrendered but concealed at the preconscious level during the Incarnation. At death, when the human body ceased to function, the human soul continued to be the seat of Christ's conscious experience, and the divine attributes remained at the preconscious level. The kryptic model can handle Christ's death naturally: the body dies, the soul separates, but the person — the single conscious subject whose human experience is the "front" of the Incarnation and whose divine attributes operate "behind the scenes" — continues to exist and to act. The preconscious divine attributes are still there, still concealed, still available. The kryptic model presupposes a soul, and the soul provides the continuity through death.

On physicalism, the kryptic model collapses. As we argued in Chapter 17, the "preconscious" level of divine attributes needs a metaphysical substrate — a framework within which conscious and preconscious states can be organized. If there is no soul — if Christ's human nature is just a body and a brain — then the "preconscious" divine attributes would need to be somehow stored in the physical brain. But divine omniscience cannot be stored in neural connections; the information content of omniscience is infinite, and a finite brain cannot contain it. The kryptic model requires a soul. And at death, when the body dies, it requires the soul to continue existing so that the kryptic architecture — the conscious human experience "in front" and the preconscious divine attributes "behind" — can persist through the triduum.³⁵

This connection between the kryptic model and the hypostatic union at death is, I believe, one of the most compelling reasons to reject physicalism. The best available model of how the Incarnation works — the model that preserves full deity, genuine humanity, one person, and two wills — requires a human soul. And the moment we come to the death of Christ, that requirement becomes absolutely critical, because the soul is the only thing that can maintain the continuity of the Incarnation through death.

Joshua Farris and the Christological Argument from Persistence

Joshua Farris, in his An Introduction to Theological Anthropology, makes a closely related point that deserves careful attention. Farris notes that the most obvious challenge for a materialist Christology comes from what he calls "the doctrine of Christ's persistence upon somatic death." He writes that upon Christ's human body dying, on a materialist account, "Christ would cease to be human. The concern that he persists raises significant worries about his representational work on behalf of humans during the intermediate state of disembodied existence. Without a human body, on a materialist account, there is no part that would sufficiently make Christ a human."³⁶

Farris puts his finger on the exact problem we have been examining. On physicalism, when Christ's body dies, Christ ceases to be human. Full stop. There is no human nature left. There is no human component persisting. Christ's humanity simply ends. And if Christ ceases to be human, then the Incarnation ceases. The God-man is no more.

What Farris also recognizes is that this has implications for soteriology — the doctrine of salvation. Christ's work of redemption does not end at the cross. It continues through the triduum, through the descent to the dead, through the resurrection, through the ascension, and into eternity. Christ's ongoing humanity is essential to His ongoing mediatorial work. As Paul writes, "There is one mediator between God and men, the man Christ Jesus" (1 Timothy 2:5, ESV). Christ is still a man. He is still human. He mediates between God and humanity in virtue of being both God and man. If Christ ceased to be human at the cross — even temporarily — then His mediatorial work was interrupted. He could not mediate between God and humanity if He was no longer human.³⁷

On substance dualism, by contrast, Christ's humanity persists through death. The soul — the immaterial component of His human nature — survives the death of the body and continues to exist in the intermediate state. Christ is still human during the triduum. He is a disembodied human — a human whose body and soul have been temporarily separated — but He is still human. His human soul retains its human properties: rationality, consciousness, will, emotion. He can still act as mediator. He can still represent humanity before the Father. He can still be the "one mediator between God and men."

The Wilkinson Argument: Chalcedonian Anthropology and Christ's Death

Michael Wilkinson's recent work Crowned with Glory and Honor: A Chalcedonian Anthropology develops an argument that has direct bearing on our discussion. Wilkinson contends that a proper theological anthropology — a proper understanding of what human beings are — must be shaped by Christology, and specifically by the Chalcedonian definition. If Chalcedon says that Christ's human nature consists of "a rational soul and body," then human nature consists of a rational soul and body. Christ is the paradigm, the exemplar, the defining instance of what it means to be human. His humanity sets the pattern for ours.³⁸

This "Chalcedonian anthropology" has a direct implication for our current topic. If Christ's human nature — the human nature that the Son assumed — includes a rational soul, then any anthropology that denies the existence of the soul is denying something that belongs to Christ's own human nature. Physicalism denies the existence of the soul. Therefore, physicalism denies something that belongs to Christ's human nature. And this denial has devastating consequences at every point in the narrative of Christ's life — but especially at the point of His death.

Wilkinson makes the additional point that the clearest biblical evidence of Christ's ontological equality with humanity is precisely His death. As Wilkinson observes, "God cannot die. It is an ontological impossibility. So the death of Christ means that something in his ontological identity as the man made him capable of actually suffering death as a man."³⁹ That "something" is His genuine human nature — body and soul. It is because Christ has a real human body that He can physically die. And it is because He has a real human soul that the Incarnation survives that death. The body-soul distinction is not incidental to the death of Christ. It is what makes the death of Christ theologically intelligible.

A Note on Thomistic Hylomorphism

Before we conclude, I want to briefly address a view that occupies an interesting middle ground: Thomistic hylomorphism. Thomas Aquinas held that the soul is the "form" of the body — not a separate substance that inhabits the body (as Cartesian dualism would say), but the organizing principle that makes the body a living human body. On this view, the soul is not a "ghost in a machine" but the form that gives the body its life, its unity, and its rationality.

Hylomorphism is not physicalism. Aquinas affirmed that the soul can exist apart from the body after death (though in an attenuated and incomplete state), and this is precisely what allows his Christology to handle the triduum so well. At Christ's death, the soul separated from the body, but the soul continued to exist — and the Son remained united to both.

However, as Taliaferro notes in Christian Physicalism?, hylomorphic animalism (a contemporary descendant of Aquinas's view, developed by philosophers like Patrick Toner) creates some metaphysical complications. On Toner's view, when a living organism dies, the organism ceases to exist and a new substance — the corpse — comes into being. This means that at Christ's death, the living body of Christ ceased to exist and a corpse came into being. What was in the tomb was not the same substance as the living body of Jesus; it was a new substance.⁴⁰

This is an interesting philosophical position, and it may be defensible on its own terms. But notice that it still presupposes a soul. Even on Toner's hylemorphic animalism, the soul continues to exist after death — it is the soul's departure that constitutes the substantial change from living body to corpse. And it is the soul's continued existence that allows the hypostatic union to survive death. Remove the soul, and you are left with pure physicalism — and all the problems we have been discussing.

So hylomorphism, properly understood, is an ally of our argument, not an opponent. It demonstrates that even a more "embodied" or "integrated" view of the soul — one that does not treat the soul as a Cartesian ghost — still requires the soul's existence and its survival after death in order to maintain the hypostatic union through the triduum. The issue is not whether we hold a Platonic or an Aristotelian view of the soul. The issue is whether there is a soul at all. Physicalism says no. And the consequences, as we have seen, are devastating.

John Cooper's Foundational Work

I would be remiss if I did not also note the important contribution of John Cooper's Body, Soul, and Life Everlasting to this discussion. Cooper, whose careful biblical exegesis of the intermediate state remains one of the most influential evangelical treatments of the topic, argued that physicalist theories of "gappy existence" (in which the person ceases to exist at death and is re-created at the resurrection) are ruled out by Christ's intermediate state. Christ was not merely "ceased to exist" between Friday and Sunday. He was active. He was conscious. He was present with the thief in paradise. He descended to the dead. He was, as the creed says, "buried" — and yet he was also, as Peter proclaims, not "abandoned to Hades."⁴¹

Cooper's argument is a powerful one, and it provides important biblical support for the philosophical case we have been making. The biblical data regarding Christ's intermediate state — His activity between death and resurrection — is simply incompatible with a physicalist anthropology that denies the survival of the soul after death. The soul of Christ was in Hades. The body of Christ was in the tomb. Both were united to the divine Person. The hypostatic union held. And it held because there was a soul to hold it.

Counterarguments and Responses: A Summary

Let me now briefly summarize the main counterarguments that a physicalist might raise against our thesis, along with our responses. I want to be fair to the physicalist position and show that I have taken their best arguments seriously.

Counterargument 1: "Physicalism can affirm that the Son remains united to the body in the tomb, so the hypostatic union is not dissolved."

Response: A corpse is not a human nature. The councils defined the human nature as "a rational soul and body." A corpse has neither rationality nor a soul. Union with a corpse is not the Incarnation. Furthermore, the communicatio idiomatum breaks down entirely if the Son is united to dead tissue.

Counterargument 2: "The Incarnation is a mystery. We should not expect to trace the metaphysics of the union through every event."

Response: Mystery is not the same as incoherence. The dissolution of the hypostatic union at death is not a mystery; it is a logical consequence of physicalism. When a position generates clear logical problems, we should address them, not hide behind the label of "mystery." As McMartin says, we should not punt to mystery on first down.

Counterargument 3: "The dualist also faces the Two Sons Worry — the worry that a soul with its own rationality and will constitutes a separate person alongside the Son."

Response: This is a legitimate concern, and the dualist must address it. But as Mullins has shown, Loke's Divine Preconscious Model provides a clear way for the dualist to avoid the Two Sons Worry. On the DPM, there is only one center of consciousness. The human preconscious cannot exist apart from the Son. The anhypostasia requirement is satisfied. The physicalist, by contrast, faces the Two Sons Worry in a different and perhaps even more severe form: the human body of Jesus would be a complete human person without the Son, violating the anhypostasia requirement.

Counterargument 4: "Some physicalists affirm an 'immediate resurrection' — Christ was immediately raised at the moment of death, bypassing any intermediate state."

Response: This view conflicts with the clear scriptural testimony that Christ's body was in the tomb for three days (Mark 15:46; Luke 23:53–24:3). It also conflicts with the creedal confession that Christ "was buried." Furthermore, as McMartin argues, the immediate resurrection view creates problems for the soteriological pattern: if Christ did not experience a genuine intermediate state, then His death is not a genuine pattern for our deaths. The immediate resurrection view is an ad hoc solution that creates as many problems as it solves.⁴²

Counterargument 5: "Dualism also has philosophical problems — the interaction problem, the problem of neural dependence, etc."

Response: These are legitimate philosophical challenges, and we addressed them in Chapter 4. But even if dualism faces philosophical difficulties of its own, this does not mean that physicalism is off the hook. The question in this chapter is not "Is dualism perfect?" but "Can physicalism account for the hypostatic union through Christ's death?" And the answer, I believe, is clearly no. The philosophical difficulties of dualism are manageable; the Christological difficulties of physicalism are catastrophic.

The Permanent Incarnation and the Hope of Easter

One final consideration deserves our attention. The death of Christ is not the end of the story. The resurrection is coming. And the resurrection confirms everything we have been arguing in this chapter.

When Christ rises from the dead, He rises as the God-man. He is still the incarnate Son. He still has a human nature — now glorified, transformed, immortal, but still genuinely human. The risen Christ eats fish (Luke 24:42–43). He shows His wounds to Thomas (John 20:27). He is recognizable, tangible, present. And He ascends bodily into heaven, where He remains the God-man forever (as we will explore in Chapter 26).

But here is the question: How can the resurrection be a restoration of the God-man if the God-man ceased to exist during the triduum? On physicalism, the Incarnation ended at the cross. The resurrection would then be a new Incarnation — a fresh start, a new union of the Son with a (now glorified) human body. But the New Testament does not describe the resurrection this way. It describes it as a victory over death — as death being conquered from within. Christ passed through death and came out the other side, still the God-man, still the incarnate Son, still united to His human nature.

This language of passing through death only makes sense if there was a continuous incarnate Person during the triduum. And that continuous incarnate Person can only exist if there is a soul that survived death and maintained the union. Death is real. Death is devastating. Death tears body and soul apart. But the Son holds both together. He does not let go. The Incarnation does not end. The hypostatic union is not dissolved. And on the third day, when the soul is reunited with the glorified body, the full human nature is restored, and the God-man walks out of the tomb — the same God-man who was crucified, the same Person who died, the same incarnate Son who will reign forever.

That is the story the New Testament tells. That is the story the creeds confess. That is the story the Church Fathers defended. And it is a story that physicalism simply cannot tell.

Conclusion

In this chapter, we have examined what happens to the hypostatic union — the union of divine and human natures in one Person — when Jesus dies on the cross. We have seen that on substance dualism, the hypostatic union survives death. The soul separates from the body, but both remain united to the Person of the Son. The Incarnation continues. The God-man passes through death and emerges on the other side at the resurrection.

On physicalism, by contrast, the hypostatic union cannot survive Christ's death. There is no soul to maintain the union. The "human nature" — which on physicalism is just the body — is now a corpse. Either the Son is united to a corpse (which is not a human nature and makes the communicatio idiomatum absurd) or the Son is no longer incarnate (which dissolves the hypostatic union, contradicts Chalcedon's "without separation," undermines the salvific significance of the cross, renders the creedal narrative incoherent, and makes the descent to the dead impossible).

We engaged with the arguments of R. T. Mullins on the Two Sons Worry, Charles Taliaferro on the metaphysics of death, Jason McMartin on the theological principles of Holy Saturday, and Joshua Farris on Christ's persistence through death. All of these scholars converge on the same conclusion: physicalism lacks the metaphysical resources to maintain the Incarnation through the death of Christ. We also drew on the patristic testimony of Athanasius, Gregory of Nazianzus, Cyril of Alexandria, John of Damascus, and Thomas Aquinas — all of whom insisted that the hypostatic union was not dissolved at death, and all of whom presupposed a dualist anthropology in which the soul survives death and remains united to the divine Person.

The death of Christ is the supreme test of any Christology and any anthropology. Physicalism fails this test. It cannot account for the Incarnation at the cross. It cannot preserve the hypostatic union. It cannot make sense of the communicatio idiomatum during the triduum. It cannot explain Christ's descent to the dead. It cannot provide the continuity between the crucified Christ and the risen Christ. And it cannot sustain the creedal confession that Christ "was crucified, died, and was buried, and on the third day he rose again."

Substance dualism, by contrast, passes the test. The soul survives death. The Son remains united to the soul. The body lies in the tomb, still united to the Son. The Incarnation holds. The God-man persists. And when Easter morning dawns, the same God-man who died — the same Person, with the same human soul, now reunited with a glorified body — walks out of the tomb in triumph.

That is the faith of the Church. That is the teaching of the councils. That is the witness of Scripture. And it requires a human soul.