# Definition of Faith of the Council of Chalcedon

- Author: Anonymous
- Latin title: *Definitio fidei Chalcedonensis*
- Date: 451 (25 Oct) (certain)
- Source: August Hahn, Bibliothek der Symbole und Glaubensregeln der alten Kirche, 3rd ed., ed. G. Ludwig Hahn (Breslau: Morgenstern, 1897), OCR of the archive.org scan (BibliothekDerSymboleUndGlaubensregel); Greek text after Mansi, Sacrorum conciliorum nova et amplissima collectio (Greek text: Hahn (1897), archive.org scan, OCR corrected by Claude)

- Translation: Claude, from the original text, unless a passage says otherwise; each passage below gives the translator
- Editions and translations: Eduard Schwartz, ed., Acta conciliorum oecumenicorum (Berlin: de Gruyter, 1914–; cited only, not reproduced); Giuseppe Alberigo et al., eds., Conciliorum oecumenicorum decreta (Bologna: Istituto per le scienze religiose, 1973; cited only); Mansi, Sacrorum conciliorum nova et amplissima collectio 4–7 (Florence/Venice 1759–)
- Work page: https://sophiascriptura.com/fathers/council-chalcedon-451-definitio/
- Passages: 1

## Definition of faith

- URL: https://sophiascriptura.com/fathers/council-chalcedon-451-definitio/1/#p-1
- Source: Hahn (1897), 166–167
- Translation: Claude (claude-opus-5-5), 2026-10-17

Summary: The Chalcedonian definition: one and the same Christ, perfect in divinity and in humanity, made known in two natures without confusion, change, division, or separation, in one person.

### Greek text

Ἑπόμενοι τοίνυν τοῖς ἁγίοις πατράσιν ἕνα καὶ τὸν αὐτὸν ὁμολογεῖν υἱὸν τὸν κύριον ἡμῶν Ἰησοῦν Χριστὸν συμφώνως ἅπαντες ἐκδιδάσκομεν, τέλειον τὸν αὐτὸν ἐν θεότητι καὶ τέλειον τὸν αὐτὸν ἐν ἀνθρωπότητι, θεὸν ἀληθῶς καὶ ἄνθρωπον ἀληθῶς τὸν αὐτόν, ἐκ ψυχῆς λογικῆς καὶ σώματος, ὁμοούσιον τῷ πατρὶ κατὰ τὴν θεότητα καὶ ὁμοούσιον τὸν αὐτὸν ἡμῖν κατὰ τὴν ἀνθρωπότητα, κατὰ πάντα ὅμοιον ἡμῖν χωρὶς ἁμαρτίας· πρὸ αἰώνων μὲν ἐκ τοῦ πατρὸς γεννηθέντα κατὰ τὴν θεότητα, ἐπ᾿ ἐσχάτων δὲ τῶν ἡμερῶν τὸν αὐτὸν δι᾿ ἡμᾶς καὶ διὰ τὴν ἡμετέραν σωτηρίαν ἐκ Μαρίας τῆς παρθένου τῆς θεοτόκου κατὰ τὴν ἀνθρωπότητα, ἕνα καὶ τὸν αὐτὸν Χριστόν, υἱόν, κύριον, μονογενῆ, ἐν δύο φύσεσιν ἀσυγχύτως, ἀτρέπτως, ἀδιαιρέτως, ἀχωρίστως γνωριζόμενον: οὐδαμοῦ τῆς τῶν φύσεων διαφορᾶς ἀνῃρημένης διὰ τὴν ἕνωσιν, σωζομένης δὲ μᾶλλον τῆς ἰδιότητος ἑκατέρας φύσεως καὶ εἰς ἓν πρόσωπον καὶ μίαν ὑπόστασιν συντρεχούσης, οὐκ εἰς δύο πρόσωπα μεριζόμενον ἢ διαιρούμενον, ἀλλ᾽ ἕνα καὶ τὸν αὐτὸν υἱὸν καὶ μονογενῆ, θεὸν λόγον, κύριον Ἰησοῦν Χριστόν: καθάπερ ἄνωθεν οἱ προφῆται περὶ αὐτοῦ καὶ αὐτὸς ἡμᾶς ὁ κύριος Ἰησοῦς Χριστὸς ἐξεπαίδευσε καὶ τὸ τῶν πατέρων ἡμῖν παραδέδωκε σύμβολον.

### English translation (Claude)

Following, then, the holy fathers, we all with one voice teach that we confess one and the same Son, our Lord Jesus Christ: the same perfect in divinity and the same perfect in humanity, the same truly God and truly human, of a rational soul and a body; of the same essence as the Father according to the divinity, and the same of the same essence as us according to the humanity, like us in all things apart from sin; begotten of the Father before the ages according to the divinity, and in the last days the same, for us and for our salvation, of Mary the Virgin, the God-bearer, according to the humanity; one and the same Christ, Son, Lord, only-begotten, made known in two natures without confusion, without change, without division, without separation, the difference of the natures being in no way taken away by the union, but rather the property of each nature being preserved and coming together into one person and one hypostasis; not parted or divided into two persons, but one and the same Son and only-begotten, God the Word, the Lord Jesus Christ; as the prophets from of old taught about him, and the Lord Jesus Christ himself taught us, and the creed of the fathers has handed down to us.

### Scripture references

- Heb 4:15: allusion, high confidence
- Heb 1:2: allusion, medium confidence
- John 1:14: echo, medium confidence

### Translation notes

- The definition of faith of the Council of Chalcedon (451), as printed by Hahn, who gives only the definition proper (the preamble and the creeds of Nicaea and Constantinople that precede it in the acts are not included).
- "Of the same essence" (ὁμοούσιον); "God-bearer" (θεοτόκος); "person" (πρόσωπον) and "hypostasis" (ὑπόστασις) are used together.
- The four adverbs ἀσυγχύτως, ἀτρέπτως, ἀδιαιρέτως, ἀχωρίστως are rendered "without confusion, without change, without division, without separation".

### Citation (SBL)

Conc. Chalced. Def. 1 (Hahn (1897), 166–167; trans. Sophia Scriptura, https://sophiascriptura.com/fathers/council-chalcedon-451-definitio/1/#p-1).