Come, let us greatly rejoice in the Lord as we tell of this present mystery.
The middle wall of partition has been destroyed; the flaming sword turns back, the cherubim withdraw from the tree of life, and I partake of the delight of Paradise from which I was cast out through disobedience.
For the express Image of the Father, the Imprint of His eternity, takes the form of a servant, and without undergoing change He comes forth from a Mother who knew not wedlock.
For what He was, He has remained, true God: and what He was not, He has taken upon Himself, becoming man through love for mankind. Unto Him let us cry aloud: God born of a Virgin, have mercy upon us.
from the Vespers of Nativity