The Principle of Communicating Vessels and the Fifth Ecumenical Council

Greek source: The Concept of Defilement of the Orthodox from Ecclesiastical Communion with Uncondemned Heretics, by Hieromonk Eugenios the Hagiorite, Thessaloniki, 2023. Text edited by Protopresbyter Dimitrios Athanasiou.

1. How the Principle of Communicating Vessels Arises

According to the “consensus Patrum” and the proceedings of the Ecumenical Councils, the “principle of communicating vessels” emerges as the spiritual mechanism through which the defilement of heresy is transmitted from one member of the Church to another. This principle does not concern the ontological loss of the priesthood, but participation in the impiety, condemnation, and schism of the heretic.

The principal ways in which this principle manifests itself and “operates” are the following:

A. Ecclesiastical Communion as a Means of Transmission. Defilement operates contagiously. Just as liquid flows between communicating vessels, so also false belief is shared from the heretic to the Orthodox Christian who is in communion with him, and from him to the “third person” who enters into communion with the one already defiled. False belief is necessarily transmitted through communion, making the Orthodox Christian a participant in it, even if he himself declares that he does not agree with the error.

B. Commemoration (Diptychs). The mention of a bishop’s name during the sacred Anaphora is regarded as full participation in the faith of the one commemorated. Through commemoration, the Orthodox Christian—even if he remains Orthodox-minded in his inward disposition—becomes a partaker in the heretic’s impiety.

C. Holy Communion. Participation in the Mysteries celebrated by uncondemned (non-deposed) heretics brings about defilement, because the faithful person becomes “a partaker of false belief and of their condemnation.” This communion is characterized as “spiritual adultery” and alienates man from God, making him akin to the devil.

D. Common Prayer and Sharing Meals. The Holy Fathers (Athanasius the Great, Basil the Great, Saint Sophronius, and others) teach that this principle extends also to common prayer or even to simple friendly association (“food and drink”) with heretics. On the basis of the principle, “Let him who communes with one who is out of communion himself be out of communion,” whoever communes with a person who is outside the Church’s sound condition himself becomes excluded from communion with the sound body of the Church.

E. Theological Foundation. The unity of the Church is not administrative but spiritual (“one in the Spirit”). When a bishop preaches heresy, he severs his unity with Christ and turns the Mysteries into “judgment and condemnation” for those who knowingly commune with him. Acceptance of this principle constitutes an “ancient and ancestral custom” and the common confession of the Saints of all ages.

Summary: The principle of communicating vessels arises from the organic unity of the ecclesiastical body, in which the spiritual condition of the head (the bishop) inevitably affects the members through liturgical and sacramental bonds.

2. Relevant Sacred Canons

According to the sources, there is a multitude of sacred Canons that establish the Church’s teaching concerning the severance of communion with heretics and the avoidance of spiritual defilement. These canons are not merely administrative provisions, but have a soteriological purpose, aiming to safeguard the believer’s unity with Christ.

A. Principal Canons on the Severance of Communion

• Canon 15 of the First-Second Council: This is the principal canon that permits and commends the cessation of the commemoration of a bishop who preaches heresy “with bared head,” even before he has been condemned by a synod. The sources emphasize that this canon is obligatory for the avoidance of defilement.

• Apostolic Canon 31: It provides for the severance of communion with a bishop who errs in matters of “piety and justice.”

B. The Principle “He Who Communes with One Who Is Out of Communion...”

These canons stipulate that whoever enters into communion with persons who have been placed outside the Church (or who preach heresy) is defiled and himself becomes excluded from communion:

• Apostolic Canon 10: It orders the excommunication of anyone who prays together with one who is out of communion, even in a private house.

• Canon 2 of the Council of Antioch: It expressly declares: “Let him who communes with those who are out of communion himself be out of communion,” a principle which, according to the Fathers, also applies to uncondemned heretics, in order to avoid sharing in their defilement.

• Apostolic Canon 11: It imposes the penalty of deposition upon a cleric who prays together with one who has been deposed.

C. Canons Concerning Common Prayer and Liturgical Presence

• Canon 33 of Laodicea: It expressly forbids common prayer with heretics or schismatics.

• Canon 9 of Timothy of Alexandria: It teaches that the presence of heretics during the Divine Liturgy causes spiritual harm to the cleric; for this reason, the deacon proclaims, “Let those who are out of communion depart.”

• Apostolic Canon 33: It forbids the reception of foreign clerics into communion if, after examination, they are found to be heretics.

D. Other Relevant Provisions

• Canon 11 of Carthage: It refers to separation from a bishop for reasons of faith.

• Canon 5 of Basil the Great: It is included among the canons that impose abstention from communion with the heterodox.

• Canons 1 and 3 of the Third Ecumenical Council: They prescribe the deposition and exclusion from communion of those who follow the false beliefs of Nestorius or Celestius.

Conclusion: The perennial consciousness of the Church (consensus Patrum) interprets these canons as a unified spiritual framework requiring the severance of communion with heresy, so that the “principle of communicating vessels” may not operate and defilement be transmitted to the sound body of the faithful.

3. Application of the Principle at the Fifth Ecumenical Council

The application of the “principle of communicating vessels” at the Fifth Ecumenical Council (A.D. 553) constitutes, according to the sources, the central ecclesiological example of the manner in which heresy is transmitted through ecclesiastical communion, even before a formal deposition.

This application was manifested in the following ways:

A. The Removal of Pope Vigilius from the Diptychs

The Council applied the principle of communicating vessels when it accepted Emperor Justinian’s proposal (“Divine Edict”) that the name of Pope Vigilius be removed from the sacred diptychs. Although the Pope had not yet been formally deposed by the Council, his removal was deemed necessary because he had identified himself with the impiety of the “Three Chapters.”

B. Defilement as “Participation in Impiety”

The reasoning of the Council, as recorded in the proceedings, was that the continued commemoration of and communion with the Pope would mean that the Orthodox Fathers of the Council also “would be found participating in the impiety of Nestorius and Theodore.”

• The principle operated as a spiritual means of transmission. The false belief of one member (the Pope) “flowed” to the other members through the liturgical mention of his name.

• It is clarified that this participation in defilement did not signify the automatic loss of the priesthood for the Orthodox, but made them jointly responsible for alienation from God.

C. The Defilement of the Purity of the Mysteries

One of the most significant applications of the principle at the Fifth Ecumenical Council was the declaration that communion with a heretical bishop “defiles the purity of the Mysteries.” According to the Council, this defilement does not render the Mysteries non-existent (invalid), but alters their effect upon the believer: instead of bringing the remission of sins, the reception of Holy Communion becomes “judgment and condemnation” for those who commune “knowingly” with impiety. The Council taught that the believer may hope for the remission of sins only when receiving communion from priests who “worship God in an Orthodox manner.”

D. The Distinction Between the Person and the See

The Council applied the principle of communicating vessels with great precision, distinguishing the person of Vigilius from the See of Rome. While it severed communion with Vigilius in order to avoid sharing in his defilement, it preserved unity with the “Apostolic See.” This demonstrates that the defilement concerns the specific spiritual relationship with the individual bearer of the heresy, and not the ontology of the Church.

E. The Universal Validity of the Principle

The position of the Fifth Ecumenical Council demonstrated that the principle of communicating vessels constitutes the common confession and perennial position of the Church. The cessation of the commemoration of an uncondemned heretical bishop was not regarded as schism, but as a “duty” and a “salutary action” for safeguarding the health of the ecclesiastical body.

 

Greek source online: https://apotixisi.blogspot.com/2026/07/blog-post_26.html