Chapter 21

Holy Saturday and the Triduum Mortis — Did the Incarnation End at the Cross?

A Day the Church Forgot

For most of us, Holy Saturday is the day we forget. Good Friday is solemn. Easter Sunday is glorious. But Saturday? Saturday is the leftover day, the bridge between sorrow and joy, the day we use to hide eggs and prepare ham. We rarely sit with it. We rarely ask what it actually means.

And yet, if I were forced to pick the single most powerful argument against Christian physicalism, it would be the argument from Holy Saturday. Not the resurrection. Not the virgin birth. Not the ascension. Saturday. Because what we believe happened during those roughly thirty-six to forty hours between the death of Jesus on the cross and His rising from the tomb tells us, more clearly than almost anything else, what we really think about the Incarnation. And it tells us, more clearly than almost anything else, whether physicalism can actually carry the weight of orthodox Christology.¹

The thesis of this chapter is direct. If physicalism is true — if a human being is nothing more than a physical organism, with no immaterial soul to survive bodily death — then the Incarnation effectively ended at the cross. For something like a day and a half, the Son of God was no longer united to a human nature. The Chalcedonian phrase “without separation” was violated. The Word who became flesh ceased to be the Word made flesh, and only became the Word made flesh again on Sunday morning. That is a Christological catastrophe. And as I hope to show in this chapter, no physicalist response actually escapes it.

The Question Honestly Stated

Let me set the question as plainly as I can. On Good Friday afternoon, Jesus died. A Roman soldier confirmed it with a spear. His body was taken down, wrapped, and placed in Joseph of Arimathea's tomb. On Sunday at dawn, that tomb was empty and Jesus was alive again. Between those two moments, what was happening?

Specifically, where was Jesus — the second Person of the Trinity, who in the Incarnation had taken to Himself a complete human nature? Was the Son still incarnate during those hours? Was the hypostatic union still in force? Was He still “true God and true man” on Saturday afternoon, while His body lay cold in a borrowed grave?

I want to argue that the answer to all three questions is yes — but only if we hold to substance dualism. On physicalism, the answer is no. And no is the wrong answer.

The Dualist Picture: A Soul That Survives

Let's start with the view I think is true. On substance dualism, a human being is a body united to an immaterial soul. At death, the body and soul separate. The body returns to the dust; the soul continues to exist consciously, either with the Lord or in some other state of conscious awaiting. (I argue for this in detail in Chapter 3 from passages like Genesis 35:18, Ecclesiastes 12:7, Luke 16:19–31, and Luke 23:43.)

Now apply that to Christ. When Jesus said, “Father, into your hands I commit my spirit” (Luke 23:46) and breathed His last, His human soul did exactly what every human soul does — it separated from His body. His body was placed in the tomb; His soul went somewhere else. Where? Scripture gives us hints. To the thief on the next cross He had said, “Today you will be with me in paradise” (Luke 23:43). Peter, quoting Psalm 16, said God did not abandon Christ's soul (psychē, ψυχή) to Hades nor let His Holy One see corruption (Acts 2:27, 31). The Apostles' Creed simply says, “He descended to the dead.”² (I treat the descent at length in Chapter 23.)

Here is the crucial point for our chapter. On the dualist picture, the human nature of Christ in death is not destroyed. It is in a strange, unnatural, separated state — body in the tomb, soul somewhere else — but both parts of His human nature still exist, and both remain hypostatically united to the Person of the Son. The Son did not lose His grip on either. His soul was His. His body was His. The hypostatic union held, even though the human nature itself was, for a time, pulled apart.

This is exactly how John Cooper frames the matter in his classic defense of holistic dualism. The continued personal existence of Jesus between death and resurrection is, Cooper insists, presupposed by every account of the triduum the church has offered, from descent into Hades to fellowship with the thief in paradise. “The composite picture,” he writes, “is a fully coherent one which necessarily presupposes the existence of the person Jesus Christ between his death and resurrection.”³ Cooper goes on to argue that any anthropology unable to accommodate the personal existence of Jesus during the triduum is, by that very fact, theologically inadequate.⁴

The Physicalist Picture: A Gap in the Incarnation

Now consider physicalism. On physicalism, a human being just is a living, functioning physical organism. There is no separable soul. When the organism dies, the person is gone — full stop — until and unless God resurrects (or recreates) that person at some future point.⁵

Apply that to Christ. The human nature of Jesus, on physicalism, simply is His body — the living, breathing, brain-bearing organism that walked the roads of Galilee. When that organism died on the cross, the human nature ceased to be a human nature in any meaningful sense. What remained in the tomb was not a human person and not even a living human nature. It was a corpse. Dead biological matter. A body in the process of beginning to decompose.

So now we have to ask the awkward question. During the roughly day and a half that the body of Jesus lay in the tomb, what was the Son of God united to? There seem to be only two answers, and both of them are theological disasters.

Answer one: He was united to nothing human. The body was dead, no longer a human nature; there was no soul; therefore the Son of God, during those hours, was not united to a human nature at all. The Incarnation was paused. Suspended. Interrupted. The Word who had become flesh ceased to be flesh until the resurrection, when He became flesh again. The Incarnation, in other words, was not permanent — it had a gap.⁶

Answer two: He was united to the corpse. The body was dead, but it was still His body, and so the hypostatic union held — between the divine Son and a piece of dead biological matter. But this answer is barely better. A corpse is not a person. A corpse is not a nature. A corpse is not even a subject of experience — there is nobody home in a corpse. The hypostatic union is supposed to be the union of the divine nature with a human nature. Dead matter is not a human nature in any meaningful, philosophical, or theological sense. Saying the Son was united to a corpse is functionally equivalent to saying He was united to nothing.

Marc Cortez, working as a sympathetic dialogue partner with Karl Barth, sees this problem with admirable clarity. He concedes that on a physicalist account, “we have no real incarnation on Saturday.” The temptation, he notes, is to call this a small theological worry — only thirty-six hours, after all — but he immediately corrects himself. What we have, on physicalism, is “a kind of reincarnation,” in which “the eternal Son appears to divest himself of humanity at one point and then incarnate himself again in humanity shortly thereafter.”⁷ That is not a marginal cost. That is the dismantling of the doctrine of a permanent incarnation.

The Chalcedonian “Without Separation”

The Council of Chalcedon (451) said that the divine and human natures of Christ are united “without confusion, without change, without division, without separation” (asynchytōs, atreptōs, adiairetōs, achōristōs; ἀσυγχύτως, ἀτρέπτως, ἀδιαιρέτως, ἀχωρίστως). The fourth of those four adverbs — achōristōs, “without separation” — is the one that the Holy Saturday problem detonates. It means that the divine and human natures of Christ are never pulled apart. Not for a long time. Not for a short time. Not for any time. Once joined in the womb of the virgin, they are never sundered.⁸ (I treat the full Definition in Chapter 11 and the metaphysics of the union in Chapter 14.)

Now, on dualism, “without separation” is honored even at the cross. The Son remains united to His soul (which is alive in paradise/Hades) and to His body (which lies in the tomb). The natures are not separated even for a moment.

On physicalism, “without separation” is violated for thirty-six hours. The divine nature is intact (the Son is God, and God cannot stop being God). But the human nature is gone — there is no living organism, and a corpse is not a human nature. So during the triduum, there is divine nature on one hand, and on the other hand, nothing. The union has been pulled apart in the only place it could be pulled apart — at the human end. Chalcedon's achōristōs is breached.

Some physicalists will say, “The duration is too short to matter.” But the Chalcedonian word is not “not for very long.” It is “without separation.” If the natures are pulled apart for an hour, a minute, or a millisecond, the conciliar definition has been compromised. And in fact, the duration is not short — a day and a half is not a trivial slice of redemptive history. It is, on the traditional reading, the very window in which Christ “descended to the dead” and proclaimed His victory (1 Pet. 3:18–20; cf. Eph. 4:8–10). On physicalism, there was no Christ to descend.

Wilkinson's Chalcedonian Anthropology Sharpens the Point

Michael Wilkinson's recent work helps me see why the Holy Saturday argument bites so hard. Wilkinson argues that we should let Chalcedonian Christology norm our anthropology, not the other way around.⁹ What Christ's humanity is, our humanity is. And Chalcedon explicitly defines Christ's humanity as composed of “a rational soul and body” (ek psychēs logikēs kai sōmatos, ἐκ ψυχῆς λογικῆς καὶ σώματος).¹⁰

Read that backwards. If a real human nature, by Chalcedon's own definition, requires both a rational soul and a body, then a Christ who lacks one of those components does not have a real human nature. Now apply this to Holy Saturday. On physicalism, between Friday and Sunday, Christ has no soul (because there is no such thing as a soul) and no living body (because the body is a corpse). What remains? On Chalcedon's own terms, nothing that counts as a human nature. The Incarnation has, by Chalcedon's own measure, lapsed.¹¹

Aquinas on the Three Days

It is worth noting briefly that the great medieval theologian Thomas Aquinas saw this problem coming and answered it from a dualist anthropology. (I treat Aquinas at greater length in Chapter 32; my purpose here is just to show how a thoughtful pre-modern theologian wrestled with it.)

Aquinas held a hylomorphic version of dualism — the soul is the form of the body, and a complete human nature requires both. So how did he handle the triduum? He argued that, during the three days, the Son remained hypostatically united to both the separated soul (which had descended to the limbus patrum, the limbo of the fathers) and the body (which lay in the tomb). Each component was strange in its separated state; neither, by itself, was a complete human nature. But because both remained hypostatically the Son's, the union was preserved across the day and a half.¹²

Notice what Aquinas's solution requires. It absolutely depends on a soul that survives the body's death. Without that soul, there is no second locus of the union — only the body. And as we have already seen, an unanimated body is not a human nature. Even Aquinas's elegant account of the triduum collapses without dualism. The tradition's best answer to the Holy Saturday question simply cannot be stated in physicalist terms.¹³

Engaging the Physicalist Volume Directly

The most thorough recent attempt by physicalists to reckon with Holy Saturday is found in Loftin and Farris's Christian Physicalism?, especially in the chapters by Jason McMartin and Marc Cortez.¹⁴ What is striking is that both authors — one critical of physicalism, the other a sympathetic interpreter of Karl Barth — concede the basic shape of the problem.

McMartin surveys three physicalist models for postmortem existence: gappy existence (the person ceases to exist at death and is recreated at resurrection), alternate temporality (the person experiences a different time stream after death), and immediate resurrection (the person is resurrected the moment they die). He then asks how each handles Christ's intermediate state. His verdict, after careful analysis, is that none of them comfortably aligns with the theological criteria orthodoxy requires — Endless Existence of God, Chalcedonian unity, the Sinlessness of Christ, the Continuity of His personal identity, and the Theological Unity of God's redemptive work.¹⁵

Cortez, working with Karl Barth, ends his careful chapter with the candid admission that constructing a coherent physicalist account of Holy Saturday is genuinely difficult. He affirms three principles — Christological Anthropology, Permanent Incarnation, and Christian Physicalism — and notes that the second and third “generate an interesting tension” in light of Holy Saturday. His proposed Barthian solution requires a controversial doctrine of human death (death as immediate entrance into eschatological presence with God), which Cortez himself acknowledges runs into “substantial difficulties in other areas,” especially regarding the embodied nature of resurrected life and the post-resurrection history of Jesus.¹⁶ He concludes that “Christian physicalists may need to look elsewhere” for a satisfying answer.¹⁷

I think the right reading of these two careful chapters is this: the Holy Saturday problem is not a strawman that dualists invented to score points. It is a real and deep problem that physicalist Christians themselves recognize, and the proposed solutions cost more than they save.

Four Physicalist Responses, and Why I Find Each One Wanting

Let me work briefly through four responses I have seen physicalists offer. (The fuller treatment of all eight major physicalist responses is in Chapter 35.)

First, “God miraculously preserved the body, so the Son was united to a still-functioning organism.” But miraculous preservation is not the same as life. A body kept from decomposing is still a dead body. There is no neural activity. There is no consciousness. There is no experience. Preserving cells from rotting does not turn a corpse into a person. The fundamental problem — that what is in the tomb is not a living human nature — is unchanged.

Second, “The same person was recreated at the resurrection, so identity is preserved.” This is the “gappy existence” view, and the worry it raises is the replica problem: is the risen Christ the same Jesus, or a perfect copy God constructed Sunday morning?¹⁸ Even if we grant that gappy identity is metaphysically possible (which is itself contested), it leaves the triduum problem entirely intact. There was still a stretch of time during which the Son was not united to a human nature. The gap doesn't disappear just because the eventual reidentification is plausible. (I treat the replica problem in detail in Chapter 24.)

Third, “The Son was immediately resurrected at death, so there is no gap.” This view bumps directly into the narrative. The body was in the tomb for three days. Mary Magdalene, Peter, and John found it empty on Sunday — not on Friday afternoon. The angelic announcement is “He has risen,” not “He is rising.” The Apostles' Creed says, “He was crucified, died, and was buried. He descended to the dead. On the third day He rose again.” Immediate-resurrection views simply erase Holy Saturday — the very day the church has affirmed for nearly two thousand years.

Fourth, “The triduum is so brief it doesn't really matter theologically.” I find this answer the least serious. Duration is not the issue. Achōristōs means without separation, full stop. If the union was broken at all — for an hour, for a minute — Chalcedon was contradicted. And in any case, thirty-six to forty hours is not nothing. It is the very window in which the New Testament locates Christ's saving activity in the place of the dead (1 Pet. 3:18–20; Eph. 4:8–10; Acts 2:27, 31).

The Pastoral and Theological Weight

I want to close personally. Holy Saturday is, for most of us, a quiet day. We do not preach much on it. Our hymnals are thin on songs about it. But theologically, it is a hinge. What we believe about Saturday tells us what we really believe about Friday and Sunday.

If the Incarnation could be paused — if the Son of God could lay aside His humanity for a day and a half and pick it up again — then the Incarnation is provisional, an attached costume rather than an indissoluble bond. But the New Testament will not let us say that. Hebrews tells us Christ holds His priesthood permanently because He continues forever (Heb. 7:24–25). Paul tells us there is, even now, “one mediator between God and men, the man Christ Jesus” (1 Tim. 2:5) — present tense, unbroken. The risen Christ shows His disciples His wounds, eats fish in front of them, ascends bodily into heaven, and is “in the same way” coming again (Acts 1:11). The Son did not become temporarily human. He became human, and He is human still.

This is the doctrine that physicalism cannot carry. Not because physicalists are wicked or careless or ignorant — many of them are careful, devout, and brilliant. But because their anthropology, applied consistently, hands them a Christ whose humanity ends and restarts. And a Christ whose humanity ends and restarts is not the Christ of the creeds.

The dualist anthropology I am defending is not a fancy philosophical add-on to the gospel. It is, I believe, the structure that lets the gospel hang together. When Jesus said, “Father, into your hands I commit my spirit,” something real left His body — and remained His. When His body lay in Joseph's tomb, the Son still owned that body — it remained His. On Sunday morning, the soul that had said “Today you will be with me in paradise” reentered the body that had been buried, and that body, transformed, walked out of the grave. The Incarnation never paused. The hypostatic union never broke. Achōristōs held — even on the day the church forgot.

That is what I think Holy Saturday teaches us. And that is why I find it the most decisive single argument I know against physicalism in Christology.