Chalcedo Creed
Definition of Chalcedon (451 AD)
Following, then, the holy fathers, we unite in teaching all men to confess the one and only Son, our Lord Jesus Christ. This selfsame one is perfect both in deity and in humanness; this selfsame one is also actually God and actually man, with a rational soul <meaning human soul> and a body. He is of the same reality as God as far as his deity is concerned and of the same reality as we ourselves as far as his humanness is concerned; thus like us in all respects, sin only excepted. Before time began he was begotten of the Father, in respect of his deity, and now in these “last days,” for us and behalf of our salvation, this selfsame one was born of Mary the virgin, who is God-bearer in respect of his humanness.
We also teach that we apprehend this one and only Christ-Son, Lord, only-begotten — in two natures; and we do this without confusing the two natures, without transmuting one nature into the other, without dividing them into two separate categories, without con- trasting them according to area or function. The distinctiveness of each nature is not nullified by the union. Instead, the “properties” of each nature are conserved and both natures concur in one “person” and in one reality <hypostasis>. They are not divided or cut into two persons, but are together the one and only and only-begotten Word <Logos> of God, the Lord Jesus Christ. Thus have the prophets of old testified; thus the Lord Jesus Christ himself taught us; thus the Symbol of Fathers <the Nicene Creed> has handed down to us.
FORMULA OF CHALCEDON
Therefore, following the holy Fathers, we all with one accord teach men to acknowledge one and the same Son, our Lord Jesus Christ, at once complete in Godhead and complete in manhood, truly God and truly man, consisting also of a reasonable soul and a body; of one substance with the Father as regards his Godhead, and at the same time of one substance with us as regards his manhood; like us in all respects, apart from sin; as regards his Godhead, begotten of the Father before the ages, but as regards his manhood begotten for us men and for our salvation, of Mary the Virgin, the God-bearer; one and the same Christ, Son, Lord, Only- begotten, recognized in two natures, without confusion, without change, without division, without seperation; the distinction of natures being in no way annulled by the union, but rather the characteristics of each nature being being preserved and coming together to form one person and subsistence, not as parted or separated into two persons, but one and the same Son and Only-begotten God the Word, Lord Jesus Christ; even as the prophets from earliest times spoke of him, and our Lord Jesus Christ himself taught us, and the creed of the Fathers has handed down to us.
STATEMENT OF CHALCEDON (451)
Definition of the Union of the Divine and Human Natures in the Person of Christ. Council of Chalcedon, A.D. 451, Act V.
Therefore, following the holy fathers, we all with one accord teach men to acknowledge one and the same Son, our Lord Jesus Christ, at once complete in Godhead and complete in manhood, truly God and truly man, consisting of a reasonable soul and body; of one substance (homoousios) with the Father as regards his Godhead, and at the same time of one substance with us as regards his manhood; like us in all respects, apart from sin; as regards his Godhead, begotten of the Father before the ages, but yet as regards his manhood begotten, for us men and for our salvation, of Mary the Virgin, the God-bearer (Theotokos); one and the same Christ, Son, Lord, Only-begotten, recognized in two natures, without confusion, without change, without division, without separation; the distinction of natures being in no way annulled by the union, but rather the characteristics of each nature being preserved and coming together to form one person and substance, not as parted or separated into two persons, but one and the same Son and Only-begotten God the Word, Lord Jesus Christ; even as the prophets from earliest times spoke of him, and our Lord Jesus Christ himself taught us, and the creed of the Fathers has handed down to us.
(BCP, pg. 864)