Consequently, when Christ came into the world, he said, "Sacrifices and offerings you have not desired, but a body have you prepared for me; in burnt offerings and sin offerings you have taken no pleasure. Then I said, Lo, I have come to do your will, O God." 84
Catechism number 467
The Monophysites affirmed
that the human nature had ceased to exist as such in Christ when the divine
person of God's Son assumed it. Faced with this heresy, the fourth ecumenical
council, at Chalcedon in 451, confessed:
Following
the holy Fathers, we unanimously teach and confess one and the same Son, our
Lord Jesus Christ: the same perfect in divinity and perfect in humanity, the
same truly God and truly man, composed of rational soul and body;
consubstantial with the Father as to his divinity and consubstantial with us as
to his humanity; "like us in all things but sin". He was begotten
from the Father before all ages as to his divinity and in these last days, for
us and for our salvation, was born as to his humanity of the virgin Mary, the
Mother of God.91
We confess that one and the same Christ, Lord, and only-begotten Son, is to be acknowledged in two natures without confusion, change, division or separation. the distinction between the natures was never abolished by their union, but rather the character proper to each of the two natures was preserved as they came together in one person (prosopon) and one hypostasis.92