Editing Chalcedonian Definition (section)

==Content==
The full text of the definition reaffirms the decisions of the [[Council of Ephesus]], the pre-eminence of the [[Nicene Creed|Creed of Nicaea]] (325) and the further definitions of the [[First Council of Constantinople|Council of Constantinople]] (381).{{sfn|Schaff|1885}}

In one of the translations into English, the key section, emphasizing the double nature of Christ (human and divine), runs:
{{Blockquote|Following, then, the holy Fathers, we all unanimously teach that our Lord Jesus Christ is to us One and the same Son, the Self-same Perfect in Godhead, the Self-same Perfect in Manhood; ''truly God and truly Man''; the Self-same of a rational soul and body; co-essential with the Father according to the Godhead, the Self-same co-essential with us according to the Manhood; like us in all things, sin apart; before the ages begotten of the Father as to the Godhead, but in the last days, the Self-same, for us and for our salvation (born) of Mary the Virgin [[Theotokos]] as to the Manhood; One and the Same Christ, Son, Lord, Only-begotten; acknowledged in Two Natures unconfusedly, unchangeably, indivisibly, inseparably; the difference of the Natures being in no way removed because of the Union, but rather the properties of each Nature being preserved, and (both) concurring into One Person and One Hypostasis; not as though He was parted or divided into Two Persons, but One and the Self-same Son and Only-begotten God, Word, Lord, Jesus Christ; even as from the beginning the prophets have taught concerning Him, and as the Lord Jesus Christ Himself hath taught us, and as the Symbol of the Fathers hath handed down to us.|source={{harvnb|Bindley|1899|p=297}} }}

The Definition implicitly addressed a number of popular heretical beliefs. The reference to "co-essential with the Father" was directed at [[Arianism]]; "co-essential with us" is directed at [[Apollinarianism]]; "Two Natures unconfusedly, unchangeably" refutes [[Eutychianism]]; and "indivisibly, inseparably" and "[[Theotokos]]" are against [[Nestorianism]].<ref name="episcopalchurch.org" />