In the Ninth Article of the Nicea-Constantinople Symbol of Faith proclaimed by the holy Fathers of the First and Second Ecumenical Councils, we confess our faith in “One, Holy, Catholic, and Apostolic Church.” By virtue of the catholic (meaning, all-encompassing) nature of the Church, an Ecumenical Council is the Church’s supreme authority, and possesses the competence to resolve major questions of church life. An Ecumenical Council is comprised of archpastors and pastors of the Church, and representatives of all the local Churches, from every land of the whole inhabited world.
The Orthodox Church acknowledges Seven Holy Ecumenical Councils:
The fact that the Seventh Ecumenical Council (2nd in Nicea) is not commemorated today testifies to the antiquity of today’s celebration. The Seventh Council was convened at Nicea in the year 787 against the Iconoclast heresy, under the emperor Constantine and his mother Irene.
The Church venerates the Holy Fathers of the Ecumenical Councils because Christ has established them as “lights upon the earth,” guiding us to the true Faith. “Adorned with the robe of truth,” the doctrine of the Fathers, based upon the preaching of the Apostles, has established one faith for the Church. The Councils, guided by the grace of the Holy Spirit, and accepted by the Church, are infallible.
The Orthodox Church’s conciliar definitions of dogma have the highest authority, and such definitions always begin with the Apostolic formula, “It seemed good to the Holy Spirit and to us...” (Acts 15: 28).
The Ecumenical Councils were always convened for a specific reason: to combat false opinions and heresies, and to clarify the Orthodox Church’s teaching. But the Holy Spirit has thus seen fit, that the dogmas, the truths of faith, immutable in their content and scope, constantly and consequently are revealed by the conciliar mind of the Church, and are given precision by the holy Fathers within theological concepts and terms in exactly such measure as is needed by the Church itself for its economy of salvation. The Church, in expounding its dogmas, is dealing with the concerns of a given historical moment, “not revealing everything in haste and thoughtlessly, nor indeed, ultimately hiding something” (Saint Gregory the Theologian).
A brief summary of the dogmatic theology of the First Six Ecumenical Councils is formulated and contained in the First Canon of the Council of Trullo (also known as Quinisext), held in the year 692. The 318 Holy Fathers of the First Ecumenical Council are spoken of in this Canon I of Trullo as having, “with unanimity of faith revealed and declared to us the consubstantiality of the three Persons of the Divine nature and, instructing the faithful to adore the Father, Son, and Holy Spirit with one worship, they cast down and dispelled the false teaching about different degrees of Divinity.”
The 150 Holy Fathers of the Second Ecumenical Council left their mark on the theology of the Church concerning the Holy Spirit, “repudiating the teaching of Macedonius, as one who wished to divide the inseparable Unity, so that there might be no perfect mystery of our hope.”
The 200 God-bearing Fathers of the Third Ecumenical Council expounded the teaching that “Christ, the Incarnate Son of God is One.” They also confessed that “she who bore Him without seed was the spotless Ever-virgin, glorifying her as truly the Mother of God.
The 630 Holy Fathers of the Fourth Ecumenical Council decreed that “the One Christ, the Son of God... must be glorified in two natures.”
The 165 God-bearing Holy Fathers of the Fifth Ecumenical Council “in synod anathematized and repudiated Theodore of Mopsuestia (the teacher of Nestorius), and Origen, and Didymus, and Evagrius, renovators of the Hellenic teaching about the transmigration of souls and the transmutation of bodies and the impieties they raised against the resurrection of the dead.”
The 170 Holy Fathers of the Sixth Ecumenical Council “taught that we ought to confess two natural wills (one divine, and the other human), and two natural operations (energies) in Him Who was incarnate for our salvation, Jesus Christ, our true God.”
In decisive moments of Church history, the holy Ecumenical Councils promulgated their dogmatic definitions, as trustworthy delimitations in the spiritual battle for the purity of Orthodoxy, which will last until such time, as “all shall come into the unity of faith, and of the knowledge of the Son of God” (Ephesians 4:13). In the struggle with new heresies, the Church does not abandon its former dogmatic concepts nor replace them with some sort of new formulations. The dogmatic formulae of the Holy Ecumenical Councils need never be superseded, they remain always contemporary to the living Tradition of the Church.
In addition to their dogmatic definitions, the Holy Fathers of the Ecumenical Councils exerted great efforts towards the strengthening of church discipline. Local Councils promulgated their disciplinary canons according to the circumstances of the time and place, frequently differing among themselves in various particulars.
The universal unity of the Orthodox Church required unity also in canonical practice, that is a conciliar deliberation and affirmation of the most important canonical norms by the Fathers of the Ecumenical Councils. Thus, according to conciliar judgment, the Church has accepted: 20 Canons from the First, 7 Canons from the Second, 8 Canons from the Third, and 30 Canons from the Fourth Ecumenical Synods. The Fifth and the Sixth Councils concerned themselves only with resolving dogmatic questions, and did not leave behind any disciplinary canons.
The need to establish in codified form the customary practices during the years 451-680, and ultimately to compile a canonical codex for the Orthodox Church, occasioned the convening of a special Council, which was wholly devoted to the general application of churchly rules. This was convened in the year 692. The Council “in the Imperial Palace” or “Under the Arches” (in Greek “en trullo”), came to be called the Council in Trullo. It is also called the “Quinisext” (meaning the “fifth and sixth”), because it is considered to have completed the activities of the Fifth and Sixth Councils, or rather that it was simply a direct continuation of the Sixth Ecumenical Council itself, separated by just a few years.
The Council in Trullo, with its 102 Canons (more than of all the Ecumenical Synods combined), had a tremendous significance in the history of the canonical theology of the Orthodox Church. It might be said that the Fathers of this Council produced a complete compilation of the basic codex from the relevant sources for the Orthodox Church’s canons. Listing through in chronological order, and having been accepted by the Church the Canons of the Holy Apostles, and the Canons of the Holy Ecumenical and the Local Councils and of the holy Fathers, the Trullo Council declared, “Let no one be permitted to alter or to annul the aforementioned canons, nor in place of these put forth, or to accept others, made of spurious inscription” (2nd Canon of the Council in Trullo).
You are most glorious, O Christ our God,
You have established the Fathers as lights upon the earth,
and through them, You have guided all of us to the true Faith.
O greatly compassionate one, glory to You.
The preaching of the Apostles and the dogmas of the Fathers
sealed the one Faith of the Church.
And clad in the garment of truth woven of theology from on high,
it teaches aright and glorifies the great mystery of piety.