Apollinarianism

The Story

Apollinaris of Laodicea was one of the good guys. He was a staunch defender of Nicene theology, a friend and ally of Athanasius in the great battle against Arianism, and a bishop of unimpeachable personal character. He was also the author of a Christological theory that the church judged a bridge too far — and his story illustrates how the road to heresy is often paved with perfectly sound theological instincts.

Apollinaris’ problem was a real one. If Christ is fully God and fully human, how do these two natures relate in a single person? Specifically, how can a divine mind and a human mind coexist in one individual without producing a kind of split personality — or worse, a being torn between two wills? Apollinaris had watched the Arian controversy tear the church apart over Christ’s divinity, and he was determined to protect the unity of Christ’s person.

His solution drew on the anthropology of his day. Following a common reading of Plato (and Paul), Apollinaris divided the human person into three parts: body (soma), animal soul (psyche), and rational mind (nous). In Christ, Apollinaris proposed, the body and animal soul were human, but the rational mind — the seat of will, reason, and personality — was replaced by the divine Logos. Christ thought, willed, and decided as God, not as a human being. This preserved the unity of Christ’s person (one mind, one will, one center of consciousness) while maintaining his divinity.

The reaction was sharp. Gregory of Nazianzus delivered the most famous rebuttal in a phrase that became a principle of Christological thinking for all subsequent centuries: “What is not assumed is not healed.” If Christ did not take on a human mind, then the human mind — the very faculty that sins, doubts, and rebels against God — has not been redeemed. The incarnation only saves what it fully embraces. A Christ without a human rational soul is a Christ who has left the most important part of humanity untouched.

The First Council of Constantinople in 381 condemned Apollinarianism alongside other Christological errors. The council affirmed that Christ is fully human in every respect, possessing a rational human soul as well as a human body. This did not resolve all the questions — those would consume the next century of debate, through Nestorius, Cyril, Eutyches, and Chalcedon — but it established a boundary: whatever the right answer is, it cannot involve a truncated humanity in Christ.

Apollinaris himself was treated with relative gentleness. He was not subjected to the savage personal attacks that some heretics endured, partly because his reputation as a champion against Arianism earned him respect even from his critics. But his followers were scattered, and his writings were largely suppressed — many survive only in fragments quoted by his opponents.

What the Council Actually Said

The First Council of Constantinople (381) did not issue a detailed treatise on Apollinarianism but included it in its condemnation of Christological errors. The council’s creed (the Niceno-Constantinopolitan Creed) affirmed that Christ “became incarnate from the Holy Spirit and the Virgin Mary and became man” — stressing full, complete humanity.

Gregory of Nazianzus, whose theology deeply influenced the council, wrote:

“If anyone has put their trust in him as a man without a human mind, they are themselves mindless and not worthy of salvation. For what he has not assumed, he has not healed; but what is united to his divinity is also saved.”

This principle — the unassumed is the unhealed — became the governing logic for evaluating every subsequent Christological proposal.

Why You Might Accidentally Believe This

If you have ever imagined Jesus as essentially God wearing a human costume — his body real but his inner life entirely divine — you have arrived at something close to Apollinarianism. Many popular depictions of Jesus, from children’s Bible stories to Hollywood films, present a Christ who is never genuinely confused, never truly tempted, never actually struggling with a decision. This “God in a skin suit” Christology is the practical Apollinarianism of the pew.

The discomfort that many Christians feel with the idea that Jesus could genuinely not know something (Mark 13:32), could be truly surprised, or could experience the kind of anguished uncertainty visible in Gethsemane (Mark 14:33-36) often stems from an unconscious Apollinarian assumption: surely his divine mind was always in control, always aware, always certain.

Worship songs that emphasize Christ’s divinity to the exclusion of his humanity can reinforce this instinct. A Christ who is primarily majestic, omniscient, and sovereign — with his humanity as a kind of accessory — is closer to Apollinaris than to Chalcedon.

The Strongest Case For This View

Apollinaris was solving a real problem. The unity of Christ’s person is theologically essential. If Christ has two complete rational minds — one divine and one human — then it is fair to ask: Who is the “I” in “I and the Father are one”? Which mind makes decisions? When Jesus prays “not my will but yours be done,” is the human mind overriding the divine mind, or vice versa? Two complete sets of psychological equipment in one person seems to imply two persons — which is exactly what Nestorius would later be accused of teaching.

Apollinaris could also appeal to the Johannine emphasis on the Logos. If “the Word became flesh” (John 1:14), and if the Logos is the rational principle of God, then it is natural to read the incarnation as the Logos taking the place of the human rational principle. The Logos does not merely enter a human being — the Logos becomes the animating intelligence of a human body.

The desire to protect Christ’s sinlessness also motivates this view. If Christ had a fully human mind with the capacity for rebellion, how was he guaranteed not to sin? Apollinaris’ framework avoids this problem: the divine mind cannot sin, so Christ’s sinlessness is assured by the structure of the incarnation itself.

The Strongest Case Against

Gregory of Nazianzus’ principle is devastating in its simplicity and has never been satisfactorily answered by Apollinaris’ defenders. The whole point of the incarnation, in the New Testament’s own framing, is that Christ shares fully in human experience so that he can redeem it. Hebrews 2:17 says he “had to be made like his brothers and sisters in every respect.” Hebrews 4:15 says he was “tempted in every way, just as we are — yet he did not sin.” If Christ’s mind was not human, these claims are misleading at best. A divine mind cannot be tempted in the way humans are tempted; a divine mind does not experience the struggle, uncertainty, and vulnerability that characterize human psychological life.

The Gospels present a Jesus who grows in wisdom (Luke 2:52), who asks genuine questions, who expresses surprise, who weeps, who agonizes in prayer. These are not merely bodily experiences — they are activities of a rational, emotional, volitional human mind. To attribute all of them to the divine Logos acting through a human body strips the Gospel narratives of their most profound theological content.

Furthermore, if the human mind is the locus of sin — the faculty that chooses rebellion — then it is precisely the human mind that most needs redemption. A Christ who takes on human flesh but not a human mind has rescued the wrapper while leaving the contents untouched.

What the New Testament Actually Says

The Gospels consistently present Jesus as possessing genuine human psychology. He learns (Luke 2:52). He is astonished by faith and by its absence (Matthew 8:10, Mark 6:6). He does not know the hour of his return (Mark 13:32). He experiences sorrow “to the point of death” (Mark 14:34). He cries out on the cross in anguish (Mark 15:34). None of these are merely physical experiences; they are expressions of a human mind engaging with reality.

Hebrews provides the most developed theological reflection. The author insists that Jesus “shared in their humanity” (2:14), was “made like them, fully human in every way” (2:17), and was “tempted in every way, just as we are” (4:15). The repeated emphasis on completeness — “every respect,” “every way” — resists any truncation of Christ’s humanity.

Philippians 2:7-8 describes Christ as taking “the form of a servant, being born in human likeness” and being found “in appearance as a human being.” Paul’s language emphasizes that the incarnation was genuine and complete, not partial or selective.

The New Testament’s witness is clear: whatever the metaphysical mechanics of the incarnation, the result was a person who experienced human life from the inside — including the life of the human mind in all its complexity.

Further Reading

• Gregory of Nazianzus, Letters 101 and 102 (c. 381 AD)
• Apollinaris of Laodicea, fragments in Hans Lietzmann, Apollinaris von Laodicea und seine Schule (1904)
• Kelley McCarthy Spoerl, “Apollinaris and the Response to Early Arian Christology,” Studia Patristica (2001)
• Brian Daley, God Visible: Patristic Christology Reconsidered (2018)
• John Behr, The Nicene Faith, vol. 2 (2004)