The Early Church and Peter's Primacy

Letter CXXIII, from Pope Leo to Empress Eudocia

Synopsis: Leo writes to Eudocia Augusta about the Palestinian monks who have been disturbed by a perverse reading of his letter to Flavian, explains the Catholic middle path between Nestorius’s division and Eutyches’s confusion of natures, urges her to recall the monks to the faith confirmed at Chalcedon and endorsed by her own synodal subscriptions, and warns that anyone who denies Christ’s two natures has no share in the body of the one whose truth they deny.

Leo, bishop, to Eudocia Augusta.

Chapter I: Leo Explains the Perverse Misreading of His Letter to Flavian and the Catholic Middle Path

How great is my solicitude — which I owe to the universal Church and to all her sons — how much I must care for the relationship of your dilection: it has become clear that the minds of some there have received a certain offense, as either ignorant interpreters or malicious ones have caused them to understand things somewhat differently from what I have preached — making them think that what I wrote to Flavian of blessed memory disagrees with them. Neither the one who does not know Greek eloquence and cannot properly transfer subtle and difficult matters into Latin, nor the one who in his own language seeks only what suffices for his quarrel, is of any use. Though my letter to the holy bishop Flavian should be sufficient for its own manifestation — needing nothing further for its defense in terms of purgation or exposition — other writings of mine agree with the same preaching, which similarly and openly set forth my meaning. For anyone who has necessity against heretics must hold the Catholic faith, which damns Nestorius — who in one Lord Jesus Christ would preach two persons for the divinity and the humanity — and equally damns Eutyches, who by Dioscorus confused the natures in Christ which Nestorius divided.

Chapter II: Those Who Wish to Be Numbered Among the Members of Christ’s Body Must Hold the Two Natures; Their Chalcedonian Subscriptions Are Cited

If therefore those we speak of venerate the name “Catholic” and are devoted to it, and wish to be numbered among the members of the Lord’s body — they must abhor the wicked errors they have dared to embrace and do penance for the impious acts committed through blasphemous outrage. They should be aided by the synodal constitutions confirmed in the city of Chalcedon, which are also confirmed by their own subscriptions — if they wish to be seen as Catholics. For the Catholic faith, even as it damns Nestorius who in the Virgin’s conception separates the nature of the Word from the flesh, declaring one Christ divided into two persons; so also it curses Eutyches who denies true human flesh in Jesus Christ — claiming the Word was so made flesh as to take on not a true servile form but its mere figure, ascribing birth, growth, suffering, death, burial, and resurrection to the divine nature alone, not to true manhood. Whoever denies that Christ participates in our nature has no participation in the body of the one whose truth he denies.

If your exhortation to their conversion has profited them — which I pray God to grant — it will provide glory to you for eternity. I beseech your clemency to indicate this to me through your letters, and that you and the good works of your faith may bear fruit; and that those whom I have named may have ceased from their madness. Dated the seventeenth day before the Kalends of July, in the consulship of Opilio, most illustrious man.

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Notes / Historical Commentary

Letter CXXIII is Leo’s direct communication with Eudocia Augusta — the former empress resident in Jerusalem, whose patronage of the Eutychian monks Leo had noted as a problem in Letters CXVII and CIX. Marcian had secretly arranged for Leo to admonish her through her son; this letter is the formal result. It is one of the rare letters in the corpus addressed to a woman, and it shows Leo adapting his tone: more pastoral and less juridical than the letters to Anatolius or Marcian, but theologically no less precise.

The opening sollicitudo formula applied to Leo’s reason for writing to Eudocia is significant. Leo owes this solicitude to the universal Church and to all her sons — including those in Jerusalem and the Palestinian holy places. The geographical reach of the solicitude does not vary by the distance or prominence of the recipient; it extends everywhere, because it is the Roman bishop’s charge for the whole body of Christ. The letter to a former empress in Jerusalem about violent monks falls under the same obligation as the letters to emperors about canonical disputes.

The doctrinal section in Chapter I-II follows Leo’s established pattern in the post-Chalcedon enforcement correspondence: stating the Catholic middle path clearly (Nestorius divides, Eutyches confuses, the Catholic faith condemns both), and then applying the Chalcedonian definition as the standard by which the monks are bound — specifically by their own subscriptions. Leo’s invocation of the monks’ own Chalcedonian subscriptions is characteristic: he is not imposing an external authority but calling them to honor the commitment they themselves made. The excommunication formula at the end of Chapter II — those who deny Christ’s human nature have no share in the body of the one whose truth they deny — completes the theological argument with the same force visible in Letter CXIV.

The Early Church and Peter's Primacy