Two natural wills.
One and the same Christ.

The question: does unity require one will?

If Christ is one person, why confess two wills? Ordinary speech associates a will with someone who wants something. Two wills can therefore sound like two competing selves, while one will seems to safeguard unity. Constantinople III refuses that shortcut. Its definition places genuinely human willing inside the life of the one incarnate Son, alongside divine willing, without making the two contrary. The problem is not solved by counting persons whenever a human capacity appears. It requires explaining what is preserved in the incarnation and what would disappear if divine action simply replaced human action. [2]

Catholic and Byzantine Orthodox witnesses both receive this central teaching. A historical controversy is not automatically a present disagreement between those traditions. The useful comparison asks how their named explanations connect complete humanity, obedience and salvation. Agreement on the formula does not establish an identical account of every psychological or philosophical question. Nor does it establish the assent of every Christian communion. This treatment concerns the content of two-natural-wills teaching, not a verdict about Roman jurisdiction or the authority of every council.

Nature, person, will and operation

In these defining texts, nature concerns the divine or human reality with its proper characteristics, while personal unity identifies whose incarnation, actions and sufferings these are. Natural will is treated as belonging to that nature, not as a second independently existing person. Operation concerns acting according to the nature's properties; it should not be flattened into an interchangeable word for wanting. Saying that the Son wills humanly means that the humanity he assumes is not deprived of willing. Saying that he wills divinely preserves his divinity rather than turning it into a created capacity.

This is an explanatory distinction drawn from the definitions, not a complete theory of agency. Two capacities do not by themselves prove two personal subjects; neither does merely repeating one-person language explain how those capacities relate. Constantinople III's further claims about nonresistance and preservation supply constraints on the relation. Modern descriptions such as two personalities, rival decision-makers or a divine remote-control system can mislead before the argument begins. No critical Greek or Latin collation is offered here, and these historical English terms should not be treated as a dictionary settling every use of the originals.

From Chalcedon to the seventh-century question

Chalcedon's definition of 451 confesses complete divinity and humanity while preserving their characteristics in one person. Constantinople III, meeting in 680–681, addresses willing and acting more explicitly. This sequence is not a claim that Chalcedon had already written the later two-wills formula, or that every intervening dispute followed one simple line. It shows a later received definition specifying a consequence of preserved humanity: flesh animated by a rational soul must not be represented as lacking human will or operation. Its local lines 50–81 place this concern in a polemical history and acknowledge Agatho's submission. Read the surrounding council argument.

The definition names and condemns earlier figures, including Honorius. Those judgments remain in the full reader; their presence is not suppressed. They are also not authenticated speeches by the condemned people. Describing the council's rejection of one-will teaching cannot reconstruct each opponent's complete position. This page offers a reasoned unity objection below rather than inventing a quotation from Macarius or another historical opponent. The council's reception of Agatho likewise does not, without a separate argument, settle later criteria for papal infallibility.

Primary anchors: preservation, not substitution

Compare both exact passages →

Which clause prevents human obedience from being read as the replacement of human willing? Compare it with Chalcedon’s preserved properties, then ask what further explanation of agency is needed. The comparison clarifies the claims before it can support an argument about either tradition.

[3] Two operations do not divide the acting Christ

The same definition then discusses operations. Its embedded quotation is attributed to Leo in this edition; it should be read as the council’s use of an older text.

We glorify two natural operations indivisibly, immutably, inconfusedly, inseparably in the same our Lord Jesus Christ our true God, that is to say a divine operation and a human operation, according to the divine preacher Leo, who most distinctly asserts as follows: "For each form (morphe) does in communion with the other what pertains properly to it, the Word, namely, doing that which pertains to the Word, and the flesh that which pertains to the flesh." For we will not admit one natural operation in God and in the creature, as we will not exalt into the divine essence what is created, nor will we bring down the glory of the divine nature to the place suited to the creature.

[3] Read operations and the divine–created distinction.

Operation adds a question about action rather than merely desire. The definition refuses to turn created action into divine essence or to reduce divinity to creaturely activity. That distinction does not assign miracles to one independent person and suffering to another. The following lines141–155 attribute miracles and sufferings to one and the same person while distinguishing the natures. An account which preserves humanity only as a passive instrument would need to explain why genuine human operation is confessed. Conversely, an account of independent actors must confront the repeated personal unity. Continue into the one-person conclusion.

The strongest objections: unity and freedom

The unity objection is serious: if willing belongs to a conscious subject, does a second natural will introduce a second subject? The definitions answer by locating both natures and their properties in one Son, not by confessing two independently existing people who coordinate. This distinguishes a capacity from another bearer of that capacity. It does not demonstrate every philosophical account of that distinction. The objector can reasonably ask for more explanation, but cannot attribute two persons to these definitions merely because the number two appears in their account of nature and will.

A freedom objection asks whether obedience without contrary rebellion is genuine human willing. If freedom means only the capacity to oppose God, the confession may appear to deny freedom while using its language. The texts instead preserve human willing and exclude its contrary resistance. This challenges the assumption that opposition is the defining measure of humanity. Obedience can be a human act rather than evidence of its absence. Yet this argument does not by itself settle debates about alternative possibilities, deliberation or how Christ's sinlessness relates to temptation.

Suffering and temptation remain real within these confessions. Chalcedon excepts sin while preserving humanity, and Constantinople III joins human operation to the identity of the one sufferer. Further study of Gethsemane and Maximus’s modes of willing needs identified texts and their context. The present comparison leaves that work open while ruling out simple replacement of human willing by divine action.

Named Catholic and Orthodox interpretations

[4] Catholic: Catechism of the Catholic Church §475 identifies two wills and natural operations and describes divine and human willing as cooperating in the incarnate Word's obedience to the Father. It also repeats the absence of resistance by the human will. This official Catholic catechetical synthesis explains received council teaching; it is not a seventh-century eyewitness or a new council definition. Its emphasis on human obedience makes submission an activity of the humanity, not a statement that no human willing exists. [4] Read §475 in its incarnation context.

[5] Orthodox: Protopresbyter Thomas Hopko's Incarnation chapter in The Orthodox Faith, hosted by the Orthodox Church in America, connects each will and activity with the integrity of its divine or human nature and with salvation. It places the sixth council after its discussion of complete humanity and personal unity, and names Maximus in that history. This is named church-hosted catechetical exposition, not a binding new definition by every Orthodox jurisdiction. Comparing its explanation with §475 reveals a shared rejection of absorption and separation; it does not prove identity on every additional Christological question. [5] Hopko on the Incarnation · Work and authorship.

Further reading and the shared teaching

Gregory's Letter101 supplies an earlier assumption-and-healing argument for complete rational humanity. That letter is not the sixth council's two-wills definition, nor is the council's quotation of Gregory automatically a quotation from Letter101. The associated path helps explain why preserving humanity matters without pretending it supplies the entire seventh-century debate. Start with the complete letter and the separate human-mind topic, then return to the exact council comparison to identify what has been added. Gregory: life and available readings · Letter101 on assumption and healing · Why a human mind?

The received definitions preserve genuinely human willing and acting in the one Christ, alongside divine willing, without contrary rebellion, absorption or a second personal subject. The named Catholic and Orthodox accounts affirm this shared teaching. It sets requirements for further explanation of agency and salvation, while questions of historical reconstruction, critical terminology and wider ecclesial authority still need their own evidence.

Editions and further study

These readings follow the named historical editions. Translation, attribution and research qualifications remain available below.