Nestorianism

Nestorianism is the teaching that the eternal Son of God and the man born of Mary remained two distinct persons joined only by a moral union, rather than one person subsisting in two natures.¹ Named for Nestorius (c. 386-451), Patriarch of Constantinople, it is a heresy condemned at the Council of Ephesus in 431 for dividing Christ’s natures so far that they threaten to become two separate persons rather than one.²

Historical Origin

Nestorius trained under Theodore of Mopsuestia in the Antiochene school, which stressed the completeness of Christ’s humanity to the point of treating the divine Logos’s presence in Jesus as “a mere moral indwelling, such as believers also enjoy, though not to the same degree.”³ He served as a presbyter in Antioch⁴ before his appointment as bishop of Constantinople in AD 428.⁵ The controversy broke out when he defended a presbyter of his own who denied that the virgin Mary could properly be called Theotokos, “God-bearer”; Nestorius preferred Christotokos, “Christ-bearer,” because, in Hodge’s summary of his position, “God, the divine nature, could neither be born nor die.”¹ In his own words: “The creature did not give birth to the creator; she gave birth to a man, the instrument of deity… from the virgin the Holy Spirit framed a temple for God the Word in which he should dwell.”⁶

Cyril of Alexandria, Nestorius’s principal opponent, “secured his condemnation by violent means” at the Synod of Ephesus in 431; the decision was at first resisted by the Greek and Syrian bishops before the wider church received it.¹ Nestorius was deposed and banished, and died in 440. His followers withdrew eastward into Persia and organized themselves into a separate communion that continues to this day.¹

Core Tenets

On the Antiochene reading Nestorius shared, Christ was “a man side by side with God, in alliance with God, sharing the purpose of God, but not one with Him in the oneness of a single personal life, a Mediator consisting of two persons.”³ Bavinck states the same position in its own technical terms: the union between God and the man born of Mary was “not a natural but a moral union; not a union (henosis) but a conjunction (synapheia) of two natures,” so that “the indwelling of God in Christ does not differ in kind but only in degree from that in believers.”² On this account the eternal Son remained “distinct from and other than” the son of David born of Mary, and Mary herself was mother of the man Jesus but not, properly, mother of God.²

Nestorius himself denied teaching two persons outright, but a 2026 dissertation on the concept of person in Christian theology explains why Cyril and the council read his language that way regardless of his intent: “Nestorius so emphasized the two distinct natures of Christ that his language entailed, at least to his opponents, two subjects in Christ, with only an outward unity.”⁷ A conjunction that stops short of a real personal union, on this reading, still amounts in practice to two subjects merely joined together, whatever the term used to describe the joining.

Confessional and Biblical Response

The question Nestorianism raises, whether Christ is one person or two, was settled for the whole church centuries before the Reformation, at Chalcedon in 451:

He is one and the same Christ, Lord, only begotten, existing in two natures without mixture, without change, without division, without separation; the diversity of the two natures not being at all destroyed by their union in the one person, but rather the peculiar property of each nature being preserved, and concurring to one person, and one subsistence.⁸

The Definition’s last two negatives, “without division, without separation,” rule out exactly the two-subject reading Nestorius’s language was charged with. The 1689 Second London Baptist Confession does not name Nestorius, but its own Christology chapter restates the same catholic verdict: Christ’s “two whole, perfect, and distinct natures” are “inseparably joined together in one person, without conversion, composition, or confusion.”⁹ A confession requiring the natures to stay “inseparably joined” in “one person” leaves no room for the moral conjunction of two persons Nestorius’s teaching implied.

Calvin draws the same conclusion from Scripture’s own way of speaking of Christ: Elizabeth calls the unborn Christ “my Lord” while addressing Mary as his mother (Luke 1:43), and Christ calls his own body “this temple” (John 2:19), language that only makes sense if one person, not two, bears both titles. “We must put far from us the heresy of Nestorius,” Calvin writes, “who, presuming to dissect rather than distinguish between the two natures, devised a double Christ.”¹⁰

Charles Hodge, arguing against a separate objection to the imputation of Christ’s righteousness, names the same error. Objectors who treat Christ’s obedience and suffering as belonging only to “the human element in the constitution of his person,” rather than to the whole divine-human person, “virtually assume the Nestorian, or dualistic view of Christ’s person.”¹¹ Hodge states the confessional alternative in the same passage:

If, therefore, humanity as assumed by him was a person, then we have two persons, two Christs, the one human, the other divine. But if Christ be only one person, and if that person be the eternal Son of God, the same in substance, and equal in power and glory with the Father, then the whole foundation of the objection is gone.¹¹

Because Christ’s obedience and suffering are the acts of that one person, not of a separate human person, Hodge treats a parallel objection, that a merely human sufferer could supply only “a human, and, therefore, only a finite value,” insufficient as “an adequate satisfaction… for the sins of the whole world,” as resting on the same Nestorian assumption.¹²

Modern Forms

Berkhof judges a strand of nineteenth-century kenotic theology to be a disguised return to Nestorius’s error. Dorner, opposing the more radical kenoticism of Gess, proposed instead a “progressive incarnation,” in which the Logos joined itself to Christ’s humanity only by degrees, according to that humanity’s “ever-increasing receptivity,” not reaching “its final stage until the resurrection.”¹³ Berkhof’s verdict is blunt: “this is merely a new and subtle form of the old Nestorian heresy. It yields a Christ consisting of two persons.”¹³ A Christology that lets the union of the two natures develop or complete itself gradually, rather than being real and entire from the incarnation, ends, on this reading, in the same two-subject Christ Nestorius’s own language was charged with, whatever framework produces it.

Related Doctrines

References

Charles Hodge, “Chapter III. Person of Christ,” in Systematic Theology, Volume II (New York: Charles Scribner and Company, 1872), 400. ↩ ↩² ↩³ ↩⁴
Herman Bavinck, Reformed Dogmatics: Abridged in One Volume, ed. John Bolt (Grand Rapids: Baker Academic, 2011), chap. 14, “The Only Begotten Son of the Father.” ↩ ↩² ↩³
Louis Berkhof, Systematic Theology (London: Banner of Truth Trust, 1969), 291. ↩ ↩²
Hodge, Systematic Theology, Volume II, 399. ↩
Ronald E. Heine, Classical Christian Doctrine: Introducing the Essentials of the Ancient Faith (Grand Rapids: Baker Academic, 2013), 78. ↩
Nestorius, Sermon 1, quoted in Cyril of Alexandria, Five Tomes against Nestorius (Oxford: James Parker & Co., 1881), li-lii, quoted in Heine, Classical Christian Doctrine, 82. ↩
Darron Thomas Chapman, “Formulations of the Concept of Person Prior to Boethius,” in “The Concept of Person in Christian Theology: An Exposition and Defense of a Classical Boethian/Thomistic Definition of Person” (PhD diss., The Southern Baptist Theological Seminary, 2026), 71. ↩
Hodge, Systematic Theology, Volume II, 401-402. ↩
The Second London Baptist Confession of Faith (1689), chap. 8, “Of Christ the Mediator,” para. 2. ↩
John Calvin, Institutes of the Christian Religion, trans. Henry Beveridge (Edinburgh: Calvin Translation Society, 1845-1846), book 2, chap. 14, 418. ↩
Charles Hodge, “Chapter XVII. Justification,” in Systematic Theology, Volume III (New York: Charles Scribner and Company, 1873), 175. ↩ ↩²
Hodge, Systematic Theology, Volume III, 175-176. ↩
Berkhof, Systematic Theology, 294. ↩ ↩²