Liturgy in the Slavonic Tongue

The heart of the Moravian mission was not merely preaching in Slavic but worshipping in it: the brothers translated the Divine Liturgy and the daily office into the new Slavonic language and celebrated the Church’s services in a tongue the people could understand. This was a pastoral principle — that a people should pray in its own voice — and, in the Latin West of the ninth century, a profound provocation, for it cut against the widespread assumption that the sacred mysteries belonged to the three “holy” languages alone. This file sets out what vernacular liturgy meant, the rite the brothers brought, and the contrast with the Frankish practice it was meant to replace.

Tradition: Pan-Orthodox (Equals-to-the-Apostles)

What the Brothers Did

When Constantine and Methodius established the Church’s worship in Moravia, they did not simply translate sermons or catechisms; they rendered the liturgical life of the Church itself into Slavonic. The Vita Constantini reports that Constantine taught his Moravian disciples the entire cycle of services in the Slavic tongue — “the morning office and the hours, vespers, compline, and the mass [liturgy]” (Vita Constantini 15; trans. Kantor 1983). The people, hearing for the first time the Scriptures and the prayers of the Church in words they understood, are said to have rejoiced; the Life frames this intelligibility as the mission’s distinguishing glory (Vita Constantini 15; Kantor 1983; Tachiaos, Cyril and Methodius of Thessalonica, 2001, ch. 5).

The principle at work is stated by Constantine himself in the disputations the Lives attribute to him: that the worship of God should be intelligible to the worshipper, on the authority of the Apostle Paul, who taught that in church he would rather speak five words with his understanding, that he might instruct others, than ten thousand words in an unknown tongue (1 Corinthians 14:19; cited in the trilingual debate, Vita Constantini 16; Kantor 1983). Paul’s whole argument in 1 Corinthians 14 — that prophecy intelligible to the assembly is to be preferred to unintelligible tongues, so that the people may say “Amen” to the thanksgiving (1 Corinthians 14:16) — became the scriptural charter of the Slavonic liturgy and the brothers’ answer to those who would confine worship to Latin (Dvornik, Byzantine Missions Among the Slavs, 1970, ch. 4; see The Trilingual Dispute).

Which Rite?

A question of real interest is which liturgy the brothers rendered into Slavonic. As Byzantine clergy they brought the Eastern rite — the Divine Liturgy in the tradition of Constantinople (the Liturgy of St. John Chrysostom and the related forms; see The Divine Liturgy) — and this Byzantine-Slavonic worship is what they first established (Tachiaos 2001, ch. 5; Dvornik 1970, ch. 4). But the matter is more complicated, because the brothers worked in a territory under Western, Latin ecclesiastical claims and ultimately secured their mission’s legitimacy from Rome. [Disputed: the liturgical formularies the Moravian mission used are debated — the Kiev Folia, among the oldest Glagolitic manuscripts, preserve a Slavonic translation of a Roman-rite (Gregorian-type) Mass, which some scholars take as evidence that the brothers, or their immediate successors, accommodated the Latin rite of the territory, perhaps after the Roman approval; others hold that the brothers’ own foundational worship was Byzantine and that the Roman-rite Slavonic texts reflect a later adaptation in the Western environment; the question of how far the Moravian liturgy was Eastern, Western, or a hybrid is genuinely open (discussion in Vlasto, The Entry of the Slavs into Christendom, 1970, ch. 2; Tachiaos 2001, ch. 5).] What is not in doubt is the decisive point: in whichever rite, the language was Slavonic, and that is what made the mission unprecedented and what its enemies attacked.

Vernacular Worship as Pastoral Principle

The deepest meaning of the Slavonic liturgy lies in the conviction behind it. The brothers held — and the Byzantine missionary tradition broadly held — that the gospel was for all peoples in their own languages, and that worship sealed off behind an unintelligible tongue failed the very people it was meant to sanctify (Obolensky, The Byzantine Commonwealth, 1971, ch. 4; Tachiaos 2001, ch. 5). This was not a denial of the universality of the faith but its application: the one faith, expressed in the many tongues of the nations, recalling the gift of Pentecost when the apostles spoke and each heard in his own language the mighty works of God (Acts 2:6–11) — an image to which the defenders of Slavonic appealed (Dvornik 1970, ch. 4). To give a people the Liturgy in its own speech was to treat that people as fully a member of the Church, not as a subject ministered to from outside; it was an act of incorporation, not merely of instruction (Obolensky 1971, ch. 4).

This principle would have consequences far beyond Moravia. The Slavonic liturgy the brothers founded became the worship of the Bulgarian, Serbian, and Rus Churches, and Old Church Slavonic the liturgical language of a great part of the Orthodox world down to the present (Obolensky 1971, ch. 4; Vlasto 1970, ch. 2; see The Spread to the Slavs). The decision taken in a Moravian church in 863 — that God might be worshipped in Slavic — shaped the religious life of tens of millions for a thousand years.

The Contrast with the Frankish Practice

The force of the brothers’ innovation is best seen against what it replaced. The Frankish mission in Moravia worshipped in Latin, a language wholly foreign to the Slavic population; the clergy were German, the rite Roman, and the people spectators at mysteries they could not follow (Vlasto 1970, chs. 2, 4; Dvornik 1970, ch. 4). For the Bavarian Church this was simply the order of things: Latin was the language of the Western Church, and the notion that the central act of Christian worship should be carried on in a “barbarian” Slavic tongue struck many Frankish clergy as not merely strange but improper, even blasphemous (Vlasto 1970, ch. 4; Dvornik 1970, ch. 4). When the brothers’ Slavonic worship began to win the Moravians, the displaced Frankish clergy responded not only out of jurisdictional resentment but out of genuine conviction that the brothers had violated the proper limits of sacred language — and they framed that conviction as the doctrine of the three holy tongues (see The Trilingual Dispute).

The contrast is the key to the whole subsequent conflict. The brothers’ Slavonic liturgy was both a pastoral triumph and a theological challenge to a settled Western assumption; the years that followed — the debate at Venice, the appeal to Rome, the papal approval, and the long Bavarian war against Methodius — were the working-out of that challenge (Dvornik 1970, chs. 4–5; see To Rome and the Death of Cyril and Archbishop and the Frankish Conflict).

References

Vita Constantini (Life of Constantine), chapters 15–16. Trans. in Marvin Kantor, Medieval Slavic Lives of Saints and Princes. Ann Arbor: Michigan Slavic Publications, 1983.
Scripture: 1 Corinthians 14:16, 14:19; Acts 2:6–11.
Dvornik, Francis. Byzantine Missions Among the Slavs. New Brunswick: Rutgers University Press, 1970, chs. 4–5.
Vlasto, A. P. The Entry of the Slavs into Christendom. Cambridge: Cambridge University Press, 1970, chs. 2, 4.
Obolensky, Dimitri. The Byzantine Commonwealth. London: Weidenfeld & Nicolson, 1971, ch. 4.
Tachiaos, Anthony-Emil N. Cyril and Methodius of Thessalonica. Crestwood, NY: St. Vladimir’s Seminary Press, 2001, ch. 5.