How the Sanctus and the Trisagion Sing the Yasna Haptanghaiti

eFireTemple

“Sanctus, Sanctus, Sanctus, Dominus Deus Sabaoth.” — The Sanctus, sung at every Catholic Mass

“Holy God, Holy Mighty, Holy Immortal, have mercy on us.” — The Trisagion, sung at every Orthodox Divine Liturgy

“Ashem at vahishtem yazamaide — hyat spentem ameshem, hyat raochonghvat, hyat vispaa vohu.” / “We worship Asha Vahishta — the holy and immortal, the radiant, the all-good.” — Yasna Haptanghaiti, Yasna 37:4

The Triple Sanctification at the Heart of Liturgy

There is a moment in every Catholic Mass when the celebrant lifts his voice and the entire congregation joins him in a single phrase. The phrase is the most distinctive piece of fixed liturgical text in Western Christianity. It is sung, not spoken. It is the threshold between the Liturgy of the Word and the Liturgy of the Eucharist. It is the gateway through which the bread and wine pass on their way to becoming the body and blood of Christ.

The phrase is the Sanctus: “Sanctus, Sanctus, Sanctus, Dominus Deus Sabaoth” — “Holy, Holy, Holy, Lord God of Hosts.” Three sanctifications. One supreme being addressed. The opening of the most sacred portion of the Mass. Every Catholic, every Lutheran, every Anglican who has ever attended a high liturgy has sung these words, in Latin or in their own language, in some moment of their religious life.

The Eastern Orthodox Church has its own version, sung at every Divine Liturgy. The Trisagion: “Hagios ho Theos, Hagios Ischyros, Hagios Athanatos, eleēson hēmas” — “Holy God, Holy Mighty, Holy Immortal, have mercy on us.” Three sanctifications, each attached to a divine attribute, addressed to the Holy Trinity, sung before the Gospel reading. It first appears in fixed liturgical form in fifth-century Constantinople and spreads outward into the Coptic, Ethiopian, Armenian, and Syrian rites. It is one of the oldest fixed elements of Eastern Christian worship.

Both prayers are explained, when explanations are offered, by reference to Isaiah 6:3 — the prophet’s vision of the seraphim crying “Holy, holy, holy is the Lord of hosts; the whole earth is full of his glory.” Christian commentators treat the Sanctus and the Trisagion as the church’s participation in the angelic hymn first heard by Isaiah in the eighth century BCE. The triple sanctification, on the standard account, is native to Hebrew prophetic tradition and was inherited from Hebrew worship into Christian liturgy.

This article makes a different argument. The triple sanctification is not native to pre-exilic Hebrew religion. The form in which it appears in Isaiah 6 — a moment of theophany followed by a triple cry of holiness directed at a supreme being attended by celestial intermediaries — is itself a feature of post-exilic apocalyptic literature, dated by mainstream scholarship to the Persian period. The structural template for the Christian Sanctus and Trisagion does not begin in eighth-century Jerusalem. It begins in the Yasna Haptanghaiti, the seven-chapter heart of the Zoroastrian liturgy, composed in Old Avestan more than a thousand years before the canonical form of Isaiah 6 was fixed. And the Yasna Haptanghaiti opens with exactly the move the Christian Sanctus performs: a triple sanctification of the supreme being, his attributive emanations, and the holy creation.

This article walks through the source text, the structural parallels, and the historical channels that connect them, and then through the implication of the parallel for any reader who has ever sung Sanctus or Trisagion without knowing what they were singing.

Yasna Haptanghaiti: The Seven-Chapter Heart of Worship

The Yasna Haptanghaiti — the “Worship of the Seven Chapters” — occupies Yasna 35 through 41 of the Avesta. It is composed in Old Avestan, the same archaic linguistic stratum as the Gathas of Zarathustra himself, and is dated by mainstream Iranian scholarship to the second millennium BCE — making it one of the oldest continuously-recited liturgical texts in any religious tradition still practiced today. Almut Hintze, in her definitive scholarly edition (Iranica 12, Harrassowitz 2007), treats the Haptanghaiti as the “heart of Zoroastrian worship” — the prayer that, embedded between the Gathas, structures the central liturgical action of the Yasna ceremony.

The opening verse of Yasna 35 establishes the triadic sanctification structure that runs through the entire seven-chapter prayer:

“We sacrifice to Ahura Mazda, the holy Lord of the ritual order, and to the Bountiful Immortals (Amesha Spentas), who rule aright, who dispose of all aright; and we sacrifice to the entire creation of the clean, the spiritual and the mundane.” — Yasna 35:1 (Mills translation)

Three categories of holiness are sanctified in a single verse, in liturgical sequence. First: Ahura Mazda himself — the supreme being, the Wise Lord, the source of all that is. Second: the Amesha Spentas — the six “Bountiful Immortals,” the divine attribute-emanations that personify the supreme being’s qualities (Vohu Mana, Asha Vahishta, Spenta Armaiti, Khshathra Vairya, Haurvatat, Ameretat). Third: the entire holy creation, both spiritual and mundane. The structure is hierarchical: God, his attributes, his works. The triple sanctification proceeds outward from the center.

The pattern continues through the seven chapters. Yasna 35:2 declares: “We are praisers of good thoughts, of good words, and of good actions.” The triadic ethical formula appears immediately, woven into the sanctification. Yasna 36 turns to the Sacred Fire as the visible presence of Ahura Mazda. Yasna 37 contains the verse that most directly anticipates the Christian Trisagion structure:

“Ashem at vahishtem yazamaide — hyat sraeshtem, hyat spentem ameshem, hyat raochonghvat, hyat vispaa vohu.” / “We worship Asha Vahishta (Best Righteousness), the most beautiful, the holy immortal, the radiant, the all-good.” — Yasna 37:4

Five attributes of divinity are joined to a single object of worship. The most beautiful, the holy and immortal, the radiant, the all-good. The Old Avestan structure is the structural prior of “Holy God, Holy Mighty, Holy Immortal” — a series of divine attributes attached to a single sanctification, sung as the heart of the liturgy. The form is even more specific: “spentem ameshem” — “holy and immortal” — is the exact construction the Trisagion echoes when it pairs Hagios Athanatos, “Holy Immortal,” as one of its three sanctifications. Spenta means holy. Amesha means immortal. The Avestan compound is the structural source.

The Yasna Haptanghaiti is, in its entirety, structured as repeated sanctification. The verb yazamaide — “we worship,” “we sanctify” — recurs more than fifty times across the seven chapters. The liturgy does not say “we worship” once. It says it again and again, attaching the verb to different aspects of the sanctified order: Ahura Mazda, the Amesha Spentas, the holy creation, the Fire, the Waters, the Earth, the Souls of the Saints, the Fravashis. The whole liturgy is a sustained act of repeated holy-naming. The Christian liturgical move of crying “Holy, Holy, Holy” is, structurally, the same move executed in compressed form.

Isaiah 6: The Apparent Counterexample

Christian apologetic literature has a ready response to any claim that Christian liturgy borrows from non-Hebrew sources: Isaiah 6:3 already contains the triple sanctification, and Isaiah 6 is dated to the eighth century BCE — well before any meaningful Persian contact with Hebrew religion. If the Sanctus comes from Isaiah 6, the argument runs, then the structural source is internal to Hebrew prophetic tradition and Persian influence is irrelevant.

This response collapses on examination of the actual scholarly dating of Isaiah 6 in its current canonical form. The historical Isaiah of Jerusalem ministered in the eighth century BCE, but the Book of Isaiah as it exists in the Hebrew canon is a composite text composed and edited over several centuries. Mainstream Old Testament scholarship since the late nineteenth century has recognized at least three layers of composition: First Isaiah (chapters 1–39, broadly attributable to the eighth-century prophet but with later additions), Second Isaiah (chapters 40–55, dated to the Babylonian exile, mid-sixth century BCE), and Third Isaiah (chapters 56–66, dated to the early Persian period, late sixth or early fifth century BCE). The book reaches its final canonical form during the Persian period.

Isaiah 6, the so-called “call narrative” in which the prophet sees the Lord “high and lifted up” and the seraphim cry “holy, holy, holy,” presents a theological architecture that scholars have long recognized as advanced beyond pre-exilic Israelite religion. The chapter contains: a vision of the heavenly throne room; named angelic beings (the seraphim) who attend the divine throne; a triple cry of holiness functioning as cultic acclamation; the prophet’s purification by a coal from the heavenly altar; the commissioning of the prophet from within the heavenly council. This is the structural form of a post-exilic apocalyptic theophany, not a pre-exilic prophetic call narrative.

Critical scholars including John Collins, Christopher Rowland, and Anders Hultgård have argued that Isaiah 6 in its current form belongs to the same theological stratum as Daniel 7, Ezekiel 1, and the throne-vision literature of the Second Temple period — the period in which Jewish theology develops named angels, hierarchical heavenly councils, and the cultic vocabulary of celestial sanctification. Whether Isaiah 6 was composed wholesale during the Persian period or whether an older eighth-century core was substantially re-edited during the post-exilic editing of the Isaianic corpus, the chapter as we have it bears the fingerprints of Persian-influenced apocalyptic theology. The triple “holy, holy, holy” enters the Hebrew canon during or after the period of Persian contact, in a literary unit whose entire form testifies to that contact.

This does not weaken the argument; it strengthens it. Isaiah 6 is not the source of the Sanctus structure that bypasses Persian influence. Isaiah 6 is itself a witness to that influence — a Persian-period apocalyptic vision that absorbed the Zoroastrian liturgical structure into Hebrew prophetic literature. Christian liturgy inherits the structure twice: once through Isaiah 6, and once through the broader Hellenistic-Jewish liturgical traditions that fed early Christian worship. Both inheritances trace back to the same upstream source. The Yasna Haptanghaiti, with its triadic sanctification of Ahura Mazda and the Amesha Spentas, is the structural prior. Isaiah 6 is one of the channels through which it reached Christian liturgy. The Sanctus is the downstream form.

The Side-by-Side

The structural parallel can be displayed in a single comparison. The Yasna Haptanghaiti on the left, the Christian liturgical sanctifications on the right.

Eight rows. Eight features. The match is not vocabulary — the Avestan spentem ameshem is not the Greek hagios athanatos, the Old Avestan yazamaide is not the Latin sanctus. The match is structural, functional, and liturgical: the same liturgical move (triple sanctification with attribute-coupling), in the same liturgical position (the threshold of the central sacred action), performed in the same theological frame (the supreme being attended by holy intermediaries, sanctified by the worshipping community in unity with the heavenly hosts). The match is consistent across eight independent dimensions of liturgical structure. By that measure the prayers are not parallels. They are siblings, and the older sibling is unmistakably the Persian one.

The Smoking Gun: Spenta + Amesha = Holy + Immortal

Among the eight rows of the comparison, one demands special attention because it is not merely structural but linguistic. The Yasna Haptanghaiti, in the verse cited above (Yasna 37:4), pairs the Avestan terms spenta and amesha as attributes of the divine: spentem ameshem, “holy and immortal.” This is not a casual phrase. It is the foundational compound from which the entire Zoroastrian theology of the divine attribute-beings is constructed. The Amesha Spentas — the “Bountiful Immortals” or “Holy Immortals” — are named precisely by this compound. Spenta means holy, sacred, bountiful. Amesha means immortal, deathless. The Amesha Spentas are the holy immortal beings.

Now consider the Trisagion: Hagios ho Theos, Hagios Ischyros, Hagios Athanatos. Holy God, Holy Mighty, Holy Immortal. The third clause uses the Greek athanatos, “immortal” — which is the exact semantic equivalent of Avestan amesha. Greek a- (privative) plus thanatos (death) yields athanatos, “not-dying.” Avestan a- (privative) plus mesha (related to a Proto-Indo-European root for death) yields amesha, “not-dying.” The two languages are using the same morphological structure to construct the same concept. The Trisagion’s “Hagios Athanatos” is, structurally and semantically, the Greek calque of Avestan spentem ameshem.

This is not a coincidence reachable through generic religious vocabulary. “Holy Immortal” as a paired epithet of divinity is rare in pre-Christian religious literature. It is not standard in the Hebrew Bible, where God is qadosh (holy) but not characteristically called immortal in the language of cultic acclamation. It is not standard in the Greek philosophical tradition, where divinity is athanatos but not characteristically called hagios in liturgical refrain. The compound “holy + immortal” as a paired sanctification of the divine being is, in fact, native to Zoroastrian theology. It is the defining attribute of the Amesha Spentas. It is the structural epithet of Ahura Mazda’s divine emanations.

When the Trisagion sings “Holy Immortal,” it sings the Avestan epithet of the Amesha Spentas in Greek translation. The hymn does not name what it is doing. The fifth-century Constantinopolitan hymnographers who fixed the Trisagion in liturgical form did not consciously translate from Avestan. They inherited a structural epithet from the Christian liturgical tradition that preceded them, which had inherited it from the Hellenistic-Jewish synagogue tradition that preceded that, which had absorbed it from the Persian theological influence on Second Temple Judaism. By the time the hymn reaches Constantinople in 433 CE, the chain of inheritance is millennia long. The structural fingerprint of “holy + immortal” as paired divine epithet remains. The source of the fingerprint is forgotten.

The Miraculous Origin Story: What It Hides

Eastern Orthodox tradition preserves a striking origin story for the Trisagion. According to the account associated with Patriarch Proclus of Constantinople (433–446 CE), the city was struck by a violent earthquake during the reign of Emperor Theodosius II. As the people prayed for deliverance, a child was caught up into the sky by an unseen force and held aloft. When he descended, he reported that he had heard the angels singing “Holy God, Holy Mighty, Holy Immortal.” The people took up the chant. The earthquake stopped. The Trisagion was thereafter incorporated into the Divine Liturgy.

The Coptic and Armenian traditions preserve a different origin story: the Trisagion was first sung by Joseph of Arimathea and Nicodemus as they took the body of Christ down from the cross. Both stories share a structural feature — they attribute the prayer to a moment of supernatural revelation rather than to ordinary human composition or inheritance. The hymn arrives, on these accounts, from outside ordinary religious history.

This is the standard pattern by which received liturgical structures get reframed as native revelations. When a religious tradition inherits a powerful liturgical form from a source it cannot or will not credit, the inheritance is preserved while the lineage is rewritten as miraculous origin. The form survives because the form works. The source is replaced by an account that places the prayer’s composition within the receiving tradition itself — dictated by angels, sung by the patriarchs at the cross, revealed to a child caught into heaven.

Both Eastern origin stories are, on their face, the kind of pious legend that circulated freely in late antique Christianity. They tell us nothing reliable about the historical genesis of the Trisagion. What they reveal, indirectly, is that the early Eastern church experienced the prayer as something that came from elsewhere. The hymn felt received rather than composed. The miraculous origin stories are the church’s acknowledgment that the structural source of the prayer lay outside the immediate Christian tradition — paired with a theological framework that allowed the source to be reassigned to angelic dictation rather than to the Persian liturgical inheritance the prayer actually carries.

The historical evidence places the Trisagion’s emergence as fixed liturgy in the fifth century, in Constantinople and the Syrian-Antiochene zone of Christian-Persian liturgical contact. The Wikipedia entry on the Trisagion notes that the hymn “was originally a Christological hymn from the Syrian tradition” before becoming Trinitarian in the Byzantine reception. Syria is the geographical hinge — the territory where Greek and Latin Christianity engaged most intensively with Zoroastrian thought, where Aphrahat and Ephrem the Syrian wrote in direct theological conversation with Persian religious vocabulary, where Christian populations lived adjacent to Zoroastrian fire-temples for centuries. The Trisagion’s historical channel runs through Syria. The Syrian channel runs through the Persian world.

What the Sanctus Sings, What the Trisagion Sings

Every Catholic Mass on earth, in every century since the prayer was fixed in the eucharistic liturgy, performs at the threshold of the consecration a triple sanctification structured on the Yasna Haptanghaiti template. Every Orthodox Divine Liturgy performs the Trisagion with its explicit “Holy Immortal” pairing that translates the Avestan epithet of the Amesha Spentas. The structural features are identical: triple sanctification, attribute-coupling, communal sung performance, placement at the central liturgical threshold, theological frame of supreme being attended by celestial attendants who participate in the sanctification.

The match is the strongest yet documented in this series. The Confiteor performs the Patet at the threshold of the Mass. The Vidui performs it at the threshold of Yom Kippur. The baptismal renunciation performs the Yasna 12 Creed at the threshold of Christian initiation. And the Sanctus and Trisagion perform the Yasna Haptanghaiti at the threshold of the eucharistic mystery itself — the moment when the bread and wine are about to become, in Catholic and Orthodox theology, the body and blood of Christ. The most sacred action of Christian liturgy is gateway-marked by a Persian liturgical structure.

This places the inheritance at the structural center of Christian sacramental life. The previous articles in this series have documented Persian inheritance at thresholds and in confessional acts. The Sanctus and Trisagion show the inheritance at the heart of the action itself — not at the door of the temple but at the altar inside it, at the moment when, in the church’s own theological self-understanding, heaven and earth meet.

For the inheritor of Zarathustra, this matters because it demonstrates that Zoroastrian liturgical structure has been continuously operative in the central worship of the largest Christian traditions on earth for over fifteen centuries. Every Sunday, in every Catholic and Orthodox church on the planet, when the celebrant lifts the chalice and the people sing the triple holy or join in the Trisagion, the Yasna Haptanghaiti is being performed in translation. The fire of the Magi is burning at the altar of the church. The structure of the prayer remembers, even when the singers do not.

The Sanctus does not merely echo Yasna 35. The Sanctus is Yasna 35 in Latin transposition, retained for fifteen centuries because the structural form is too powerful to discard, attributed to Isaiah’s eighth-century vision because the original source had been forgotten or could not be acknowledged. The Trisagion does not merely parallel Yasna 37. The Trisagion is the Greek calque of spentem ameshem, sung at every Eastern liturgy, attributed to angelic revelation because the original source was unrecoverable to its inheritors.

Spenta. Amesha. Holy. Immortal. Hagios Athanatos. Sanctus, Sanctus, Sanctus.

The hymn is the same. The fire is the same. The Wise Lord and the Bountiful Immortals stand at the heart of every liturgy that performs the triple sanctification, named or unnamed, recognized or unrecognized.

Holy. Holy. Holy.

And the source of the holiness is older than the language we now use to sing it.

Sources & Further Reading

Avesta: Yasna Haptanghaiti, Yasna 35–41. Mills translation (1898), Humbach (1991). Critical edition: Almut Hintze, A Zoroastrian Liturgy: The Worship in Seven Chapters. Iranica 12. Harrassowitz, 2007.

Avesta: Gathas (Yasna 28–53), Insler translation (1975) and Mills (1887).

Roman Missal. The Sanctus in the Eucharistic Prayer: “Sanctus, Sanctus, Sanctus, Dominus Deus Sabaoth…”

Liturgy of Saint John Chrysostom. The Trisagion in the Byzantine Divine Liturgy.

Liturgy of Saint Basil. Parallel use of the Trisagion in the Eastern liturgical tradition.

Coptic, Ethiopian, Armenian, and Syriac liturgical texts. Parallel uses of the Trisagion across the Oriental Orthodox traditions.

Isaiah 6:1–8. The triple sanctification in the prophet’s call narrative.

Revelation 4:8. The four living creatures sing “Holy, holy, holy is the Lord God Almighty.”

Boyce, Mary. A History of Zoroastrianism, Vols. 1–3. Brill, 1975–1991.

Hintze, Almut. “On the Compositional Structure of the Avestan Gahs.” In Religious Themes and Texts of Pre-Islamic Iran and Central Asia, Reichert, 2003.

Collins, John J. The Apocalyptic Imagination. Eerdmans, 1998. On the post-exilic dating of throne-vision literature.

Hultgård, Anders. “Persian Apocalypticism” in The Encyclopedia of Apocalypticism, Vol. 1. Continuum, 1998.

John of Damascus. Exposition of the Orthodox Faith, Chapter X (“On the Trisagion”).

Aphrahat, Demonstrations (4th century Syrian Christian). Engagement with Zoroastrian theology in adjacent territory.

Ephrem the Syrian, Hymns Against Heresies. Polemical engagement with Zoroastrian doctrine.