HistoricalChristian.Faith

Was Tertullian’s corporeal soul crude materialism, or a defensible anti-Platonism?

Type: supporting argument (off-timeline) · Related arguments: his theology — see also the summary’s grouped treatment and its siblings, was Tertullian’s subordination of the Son one of order and origin, not of nature? and was his tradux peccati — sin inherited with the propagated soul — heterodox, or the germ of original sin? · Assessment: contested — on the interpretation weighed here, Tertullian’s doctrine that the soul is a body (corpus animae) — and his extension of the same principle to God, “who will deny that God is a body, although ‘God is a Spirit’?” — is not the crude materialism the charge implies but a point about substance: in the Stoic idiom he borrows, “body” names whatever really exists and can act and be acted upon, so his corpus does the work Latin had no better word for, substantia, real subsistence, against the Platonic and Gnostic construction of soul and spirit as immaterial nothings. On that core — the soul is a real created thing, not a fragment of the divine — he is orthodox, and the Platonizing opponents he wrote against (pre-existent, quasi-divine souls) were the ones the church later condemned. That much holds. But the charitable reading overreaches when it reduces the doctrine to a vocabulary problem: Tertullian means it more literally than that, giving the soul figure, the three dimensions, and colour — the last two on a Montanist visionary’s report — and he takes over a whole Stoic materialist psychology (only a body can suffer; the soul suffers in Hades; therefore the soul is a body), not merely a term; the corporeal God is a further step later orthodoxy firmly refused; and Augustine, who leaned toward Tertullian’s own traducianism and had every motive to defend a fellow African, still judged the corporealism an error and argued at length that the soul is no body. Defensible by the standard of his realist intent and his sources’ usage, deficient by the standard of the incorporealist metaphysics the church settled into — and strong readers divide on which standard governs.

This is the one doctrinal charge in the case against Tertullian, and it stands a little apart from the disciplinary counts gathered under the fairness of the verdict. It is the charge Augustine names and then expressly sets aside — see “Was the New Prophecy heretical in doctrine, or only in discipline and church order?” — so this page asks the question that one defers: granting that the corporealism was not the ground of the heresy, was the corporealism itself an error? The doctrine belongs to Tertullian’s traducianism, and its full setting is on his page on the origin of the soul, where the corporeal soul is shown to be the price he pays for propagating the soul from Adam.

The claim

When we aver that the soul has a body of a quality and kind peculiar to itself, in this special condition of it we shall be already supplied with a decision respecting all the other accidents of its corporeity… we shall not be at all inconsistent if we declare that the more usual characteristics of a body, such as invariably accrue to the corporeal condition, belong also to the soul—such as form and limitation; and that triad of dimensions—I mean length, and breadth and height—by which philosophers gauge all bodies.

— Tertullian, A Treatise on the Soul (De anima) 9, ANF vol. 3. The same principle is carried up to God in Against Praxeas 7: “For who will deny that God is a body, although ‘God is a Spirit’? For Spirit has a bodily substance of its own kind, in its own form.”¹ The interpretation weighed here does not deny that Tertullian said these things; it reads them. It holds that the load-bearing word, corpus, means for Tertullian real subsistence — the Stoic body, whatever truly exists and can act and be acted upon — and not matter in the modern sense; that the qualifier “of a quality and kind peculiar to itself” (proprii generis) marks the soul off from every material stuff; and that the whole doctrine is aimed, in substance, at a genuinely orthodox target: the soul is a created thing, distinct from God and from body alike, not the immaterial and quasi-divine soul of the Platonists and the Gnostics. So read, the corporealism is a defect of vocabulary in a Latin still without its terms, not a lapse into physicalism, and on the matter itself Tertullian was right where his opponents were wrong.

Who advances it

The reading is advanced, first, by Tertullian himself, who never hides the doctrine but frames it as anti-Platonic realism: the soul “has a body of a quality and kind peculiar to itself,” a fine and ethereal substance, not the fire of Heraclitus or the atoms of Epicurus. It is taken up, second, by the modern students of the treatise, who read his corpus within the Stoic physics he is openly borrowing — a physics in which “body” is the mark not of grossness but of reality, of what can act and suffer — so that his corporealism is a claim about the soul’s substantiality rather than its composition. J. H. Waszink’s standard commentary on the De anima sets the doctrine squarely in that Stoic frame; and even readers who find the letter of his definition indefensible grant that his soul-body, “of a quality and kind peculiar to itself,” is nearer to a doctrine of a fine spiritual substance than to materialism as the word is now used.²

The evidence for

Tertullian qualifies the soul’s body as unique in kind, not a material stuff. He opens the crucial chapter by insisting that the soul’s corporeity is proprii generis — “of a quality and kind peculiar to itself” — and repeatedly separates his view from the crude physicalisms of the philosophers who “mould the soul out of manifest bodily substances,” Hipparchus and Heraclitus out of fire, Hippon and Thales out of water, Epicurus out of atoms. His soul is immortal, simple, rational, and “sprung from the breath of God”; whatever “body” means for such a thing, it cannot be what it means for a stone. The word carries a metaphysical, not a chemical, claim.³

The doctrine’s real target is Platonic and Gnostic immaterialism, and there Tertullian is orthodox. The corporealism is the far end of an argument whose near end is unimpeachable: that the soul had a beginning and is therefore a creature, not a fragment of divinity. Against Plato, who “will have the soul to be unborn and unmade,” Tertullian teaches that “from the very fact of its having had a beginning… it had both birth and creation,” reckoning it “very far below God… as the breath (of God), though not His Spirit.” The insistence that the soul is a real, bounded, created substance is the same instinct that made him the fiercest enemy of the Gnostics and the Docetists, for whom soul and even Christ’s flesh dissolved into appearance; in On the Flesh of Christ he presses the corporeality of the soul precisely to secure that Christ took a real human soul, not a phantasm. And it is his opponents’ position, not his — the pre-existent, quasi-divine soul — that a later age anathematized. On the thing the doctrine is for, Tertullian stands where the church stood.⁴

“Body” in his sources means “what exists and acts,” and Latin had no settled word for it. Tertullian argues the corporeality of the soul out of the Stoics, whom he “call[s] on … to help me”: Zeno’s syllogism that what departs at death and causes the living being to die is a body, and Cleanthes on the inheritance of character. In that physics “body” is the criterion of the real — only a body can act or be acted upon — so that to call the soul a body is to say it truly subsists and truly does things, which is exactly what the immaterialists denied. Writing the first technical Latin theology, with substantia itself among the words he was still forging, Tertullian reached for corpus to carry the load a later, more settled vocabulary would carry with substantia or subsistentia. Read against that background, the corporeal God of Against Praxeas is a clumsy way of asserting that God genuinely is — has substance and form — in a treatise whose whole burden is the reality and distinction of the divine Persons against a heresy that collapsed them.⁵

Adversarial assessment

What holds. The charge of crude materialism, taken flatly, does miss him. Tertullian’s soul-body is not fire or water or atoms but a substance “of a quality and kind peculiar to itself,” immortal and God-breathed; his word corpus genuinely does duty for substantia in a Latin that had not yet fixed its terms; and the doctrine’s core purpose — that the soul is a created, subsisting thing, neither God nor a mere appearance — is orthodox, and was the very point on which his Platonizing adversaries later fell. To the extent the interpretation says “this is substance-realism against immaterialism, not physicalism,” it is capturing something real and worth defending.

He means it more literally than “mere vocabulary” allows. The reduction to a terminological slip cannot absorb the detail of De anima 9. Tertullian does not stop at calling the soul a substance; he gives it “form and limitation,” the “triad of dimensions—length, and breadth and height,” a “figure” that is the human form, and even a colour — and he grounds the shape and colour not on argument but on a Montanist sister’s ecstatic vision of “a soul in bodily shape… soft and transparent and of an etherial colour, and in form resembling that of a human being in every respect.” Spatial extension in three dimensions, figure, and colour are not what anyone means by “substance”; they are the properties of a body in the ordinary sense, and Tertullian ascribes them deliberately and defends them from revelation. This is more than a Latin without the right word: it is a positive picture of the soul as an extended, shaped, coloured thing.⁶

The doctrine is Stoic physics wholesale, not a neutral turn of phrase. What he borrows from the Stoa is not a word but an argument, and a materialist one. His proof that the soul is a body in On the Soul 7 is the Stoic criterion applied to the Gospel: only a corporeal thing can suffer, the rich man’s soul suffers in the flames of Hades and Lazarus’s is refreshed, therefore souls are bodies — “for an incorporeal thing suffers nothing.” That inference commits him to the whole Stoic doctrine that only bodies are real and act, a doctrine on which God, the virtues, and the soul are all alike corporeal. He does not merely label the soul’s substance “body”; he reasons from a physics in which incorporeals do nothing and undergo nothing, and he follows it where it leads. Specialists who read the corpus as “substance” are right about the sense of the word and understate the system behind it.⁷

The corporeal God is the harder case, and a genuine deficiency. To say the soul subsists is one thing; to say “God is a body” is another. Even qualified as a “bodily substance of its own kind,” the formula runs against the divine incorporeality and simplicity that later orthodoxy made foundational, and it is no accident that Augustine names both the corporeal soul and the corporeal God as Tertullian’s errors. The charitable reading is at its strongest for the soul, where “body” can plausibly mean “real substance”; it is at its weakest for God, where the same move imports extension and form into the Godhead. That Tertullian intends only to affirm that God truly is may be granted; that his language is adequate to what he intends cannot be.⁸

A sympathetic witness still called it an error. The most telling counterweight is Augustine. He shared Tertullian’s leaning to a propagated soul — he could never bring himself to creationism, precisely because he could not see how a freshly made soul contracts Adam’s guilt — and he handled Tertullian gently everywhere else, dating the church’s earlier age by naming him beside Cyprian. He had every motive to excuse the corporealism of a fellow African whose traducianism he was half-minded to keep. He did not. In his treatise on the soul’s origin he argues at length, against Vincentius Victor, that the soul is not a body, correcting a fellow traducianist for the very corporealism Tertullian had held; and in the heresy-handbook he records the corporeal soul and God as Tertullian’s doctrine even while — the point of the companion argument — declining to make it the ground of the heresy: “yet he is not on this account said to have been made a heretic.” A defender this well-disposed, judging the corporealism a mistake he would not follow, is strong evidence that it is more than a harmless quirk of vocabulary.⁹

Assessment

contested. The steelman is partly right and partly overstated, and which way it settles depends on the standard one applies. It is right that Tertullian is no crude materialist: his soul-body is a fine, God-breathed substance “of a quality and kind peculiar to itself,” his corpus does the work of an as-yet-uncoined substantia, and the doctrine’s real point — that the soul is a created, subsisting thing and not a fragment of the divine — is orthodox and was vindicated when the church condemned the Platonizing alternative. But the strong form of the claim, that the corporealism is merely a problem of pre-technical vocabulary, will not hold. Tertullian ascribes the soul three-dimensional extension, figure, and colour, resting the last on a visionary’s report; he reasons from a thoroughly Stoic physics in which only bodies are real and act; and he carries the principle up to God in a way later orthodoxy firmly refused. Even Augustine, who inclined to his traducianism and defended him elsewhere, judged the corporeal soul an error and wrote against it. So the doctrine is defensible as substance-realism against immaterialism and by the light of the Stoic sources Tertullian openly used, and deficient by the light of the incorporealist metaphysics of God and soul the church afterward settled into — strong by the one discipline’s lights, weak by the other’s, with serious readers on both sides. That is the shape of a genuinely disputed question. Contested.

Sources