HistoricalChristian.Faith

The Person of Christ (one hypostasis, two natures)

Once the Son’s full deity was settled at Nicaea and Constantinople, a harder question opened behind it: if the one Jesus Christ is at once God and man, how are the two joined? One person or two? One nature or two? A confusion of the two into a third thing, or a mere partnership of two that never really becomes one? This timeline traces how the church worked out its answer — one and the same Christ, in two natures, without confusion and without division — and the live question it turned on: is that formula a faithful drawing-out of “the Word became flesh” (John 1:14), or an over-refined Greek scaffolding read back into the Gospel? The witnesses show the doctrine reached its shape only after each wrong turn was tried — a mind swallowed by the Word, a Christ split into two sons, a manhood dissolved into the Godhead — and each was ruled out in turn.

The arc runs from Apollinaris’s truncated manhood (the divine Word replacing Christ’s human mind), through the collision of the two great schools — the Antiochene Nestorius, who so guarded the distinction of natures that he seemed to leave two sons, against the Alexandrian Cyril, who bound them into “one” by a hypostatic union and made Theotokos its test — to the settlement: the Council of Ephesus (431) for Cyril, Leo the Great’s Latin Tome (449) with its “each nature performs what is proper to it,” and the Council of Chalcedon (451) that welded the two traditions into a single Definition. The story does not end there: the East spent two more centuries absorbing the shock — Leontius of Byzantium’s enhypostasia, the neo-Chalcedonian Second Council of Constantinople (553), and the last battle, over whether the one Christ has one will or two, won by Maximus the Confessor at the Third Council of Constantinople (680–81) — before John of Damascus gathered the whole result into one settled synthesis for the East. It runs alongside the wiki’s pages on the Trinity (the deity this doctrine presupposes) and Theotokos (the same controversy seen through its most famous slogan).

Related doctrines: The Godhead and the person of Christ — see also the Trinity · the Filioque · Theotokos (Mother of God)

Timeline

Apollinaris of Laodicea (c. 375)

Apollinaris, bishop of Laodicea and once a staunch ally of Athanasius against the Arians, made the first great Christological error by over-securing Christ’s unity. To keep Christ from being two persons, he taught that in the incarnate Lord the divine Word took the place of the human rational soul or mind: the Word “has become flesh, not having taken upon himself a human mind that is changeable… but a mind that remains divine, an unchangeable and heavenly mind.”¹ Gregory of Nazianzus answered with the axiom that would govern all later Christology: “that which He has not assumed He has not healed; but that which is united to His Godhead is also saved” — a Christ without a human mind saves no human mind.² Condemned at Constantinople (381), Apollinaris fixed the terms of the crisis to come: a real, whole manhood must be confessed without splitting the one Christ.

Nestorius (c. 429)

Nestorius, the Antiochene patriarch of Constantinople, pressed the opposite guard so hard it looked like the opposite error. Fearing that calling Mary Theotokos (“God-bearer”) made the Godhead originate from a creature or confused the natures à la Apollinaris, he ranked the title below the scriptural Christotokos: “I have no doubt that the term Theotokos is inferior to the term Christotokos, as the latter is mentioned by the angels and the gospels.”³ He insisted each nature keeps its own properties, “adored through an unconfused conjunction of the highest sort in the single person of the only-begotten” — and protested to the end that he taught no division: “we have not two Christs or two sons… but one and the same.”⁴ His enemies heard in his “conjunction” a mere partnership of two persons, and in his refusal of Theotokos a denial that the one born of Mary is truly God.

Cyril of Alexandria (c. 430)

Cyril of Alexandria answered with the vocabulary that would carry the day. The union is not a “conjunction” but a real becoming-one: the Word “united to himself hypostatically flesh enlivened by a rational soul, and so became man… two different natures come together to form a unity, and from both arose one Christ, one Son” — whence Mary is truly Theotokos, not because the Word took the origin of his being from her but because “there was born from her his holy body… with which the Word was hypostatically united.”⁵ Because the union is real, what is said of the man may be said of God: the one Christ “suffered in the flesh… freedom from suffering even thus is kept to Him in that He is conceived of as God” — the impassible Word truly crucified “the flesh suffering this, not the Word apart and by Himself.”⁶ Cyril’s Twelve Anathemas made these confessions binding tests; his one weapon that would trouble the future was the slogan “one incarnate nature of the Word,” which he thought Athanasian but which in fact came from Apollinaris — the seam along which the church would later tear.

The Council of Ephesus (431)

The Third Ecumenical Council upheld Cyril. It read his Second Letter to Nestorius as faithful to Nicaea, confessed Mary Theotokos, and deposed Nestorius, resolving “with many tears… that Nestorius be excluded from the episcopal dignity, and from all priestly communion”; its seventh canon forbade framing any rival creed to Nicaea.⁷ The verdict is treated in full on the Theotokos timeline. Two years later the Alexandrian and Antiochene parties patched their quarrel in the 433 Formula of Reunion — “a union of two natures… one Christ, one Son, one Lord” — the first joint statement to hold Cyril’s “one” and the Antiochenes’ “two natures” in a single breath, and the direct seed of Chalcedon.

Leo the Great (449)

Leo the Great, bishop of Rome, gave the Latin West’s decisive statement in his Tome to Flavian, written against the monk Eutyches, who had run Cyril’s “one nature” into its own heresy — a manhood swallowed up in the Godhead. Leo held the two together without confusion: “the properties of either nature and substance… came together in one person,” each keeping “its own proper character without loss” — “in the whole and perfect nature of true man was true God born.”⁸ His most quoted line grants each nature its own agency in the one Christ: “each form does what is proper to it with the co-operation of the other; that is the Word performing what appertains to the Word, and the flesh carrying out what appertains to the flesh.”⁹ At the “Robber Synod” of Ephesus (449) the Tome was suppressed; two years later a council would read it aloud as the voice of Peter.

The Council of Chalcedon (451)

The Council of Chalcedon, the Fourth Ecumenical Council, welded Cyril’s “one” and Leo’s “two” into the church’s enduring formula. Its Definition confesses “one and the same Jesus Christ… in two natures, unconfusedly, immutably, indivisibly, inseparably… the peculiar property of each nature being preserved, and being united in one Person and subsistence… not separated or divided into two persons, but one and the same Son,” born “of the Virgin Mary, the Mother of God according to his manhood.”¹⁰ The four adverbs — without confusion, without change, without division, without separation — fence off every wrong turn at once: Eutyches’ confusion, Apollinaris’ change, Nestorius’ division. It is the high-water mark of the doctrine — and also the rock the church split on, for the miaphysite churches of Egypt and Syria read “in two natures” as a betrayal of Cyril and never received it.

Severus of Antioch (c. 515)

Not everyone received the settlement, and the timeline’s next witness is its ablest dissenter. Severus of Antioch, patriarch 512–518 and the great theologian of the churches that refused Chalcedon, held strictly to Cyril’s “one incarnate nature of God the Word” and judged the Definition’s “in two natures” a relapse into Nestorius: once the natures are counted after the union and “each of the natures performs its own acts” — the very words of Leo’s Tome — one has “divide[d] the one and only Christ into two natures.” Yet Severus was no Eutychian: “Flesh does not renounce its existence as flesh… nor has the Word departed from his nature… but the difference also is preserved” — his “one nature” is a composite one, of Godhead and manhood without confusion.¹¹ His Philalethes argued that Chalcedon had clothed itself in Cyril only by citing him selectively — that Chalcedon, not miaphysitism, was the deviation. Whether that charge holds is weighed under Arguments below; his communion, still some sixty million Christians, has never accepted the council.

Leontius of Byzantium (c. 540)

Leontius of Byzantium supplied the concept that answered the sharpest objection to Chalcedon: if Christ’s human nature is real and complete, is it not then its own person, so that “two natures” means two hypostases after all? Leontius’ school replied that the manhood is neither an independent hypostasis nor anhypostatos (without hypostasis at all), but enhypostatos — real and subsisting in the hypostasis of the Word. The human nature has “a valid existence… avoiding the perception of it being merely an illusion,” yet never stands alone.¹² The distinction let Chalcedonians confess a whole humanity without a fourth person, and became the standard grammar of the one hypostasis in two natures. (Recent scholarship debates whether Leontius himself used enhypostatos as the technical term later credited to him.)

The Second Council of Constantinople (553)

The Fifth Ecumenical Council, convened by Justinian, read Chalcedon through Cyril’s eyes — the “neo-Chalcedonian” synthesis. It condemned the “Three Chapters” (writings of the Antiochene party that miaphysites cited to brand Chalcedon Nestorian) and dogmatized the theopaschite confession Cyril’s twelfth anathema had defended: “If anyone does not confess that our Lord Jesus Christ who was crucified in the flesh is true God and the Lord of Glory and one of the Holy Trinity: let him be anathema.”¹³ “One of the Trinity suffered in the flesh” became orthodox — the communicatio idiomatum written into the church’s law.

Maximus the Confessor and the Third Council of Constantinople (c. 640–681)

Maximus the Confessor fought the last great Christological battle. A new formula — Monothelitism, that the one Christ has a single (divine) will — had been floated to win back the miaphysites; Maximus saw that it re-ran Apollinaris, truncating the manhood at the level of the will. If a will belongs to a nature, then two natures entail two wills: Christ “possesses as a human being a natural will, which is shaped, but not opposed, by his divine will” — the human will in Gethsemane freely conforming, not overridden.¹⁴ He was condemned, his tongue and right hand cut off, and died in exile — but the Third Council of Constantinople (680–81) vindicated him, defining that Christ has “two natural wills… not contrary the one to the other… but his human will follows, and that not as resisting and reluctant, but rather as subject to his divine and omnipotent will.”¹⁵ With the two wills, the two-natures confession reached its last refinement — the shape the church has held since.

John of Damascus (c. 743)

John of Damascus, the last of the Greek fathers, added no new doctrine — he systematized the whole result. Book 3 of his An Exact Exposition of the Orthodox Faith set down, as one connected textbook, the entire grammar the councils had won piecemeal: a union of two perfect natures “by synthesis; that is, in subsistence, without change or confusion or alteration or difference or separation… one subsistence of the Son of God incarnate,” each nature keeping its own properties yet exchanging them (communicatio idiomatum) through “the interpenetration of the parts,” so that “the Lord of Glory is said to have been crucified, although His divine nature never endured the Cross.”¹⁶ He fixed Leontius’ answer to the two-sons objection in its permanent form — the manhood is enhypostatos, for “the flesh of God the Word did not subsist as an independent subsistence… but… became rather a subsistence which subsisted in another” — and carried Maximus’ verdict forward: “since, then, Christ has two natures, we hold that He has also two natural wills and two natural energies… wills and energies are faculties belonging to nature, not to subsistence.”¹⁷ It is this synthesis, not the councils’ scattered acts, that carried the confession forward as the standard of the East (and, in Latin translation, fed the medieval West and Aquinas).

Arguments

Two questions the timeline turns on get their own pages — whether the union licenses the church’s boldest way of speaking about the cross, and whether the settlement that ended the story was faithful to the man who began it:

• Does the union license saying “God suffered” and “one of the Trinity was crucified in the flesh”? (the theopaschite formula) — sound — true of the one divine subject in the flesh he made his own, so long as the divine nature is not made passible; drop that guard (Peter the Fuller’s Trisagion) and the same words become heresy.
• Was Chalcedon a betrayal of Cyril? — contested — the miaphysite charge (advanced by Severus of Antioch) is strong on terminology — Chalcedon dropped Cyril’s “one incarnate nature”, adopted the “in two natures” he avoided, and restored his opponents — but weak on substance: the Definition keeps his hypostatic union and Theotokos, and the modern Orthodox dialogues find one faith under two idioms.

Sources