"How is he contained in a womb, whom nothing can contain?"

Christ is born! Glorify Him!

The Nativity in the Flesh of our Lord, God and Savior Jesus Christ, detail (source)

  

How is he contained in a womb, whom nothing can contain? How held in his Mother’s arms, he who is in the Father’s bosom? This is all as he knows, as he wished and as he was well pleased. For being without flesh, willingly he was made flesh; and He Who Is, for our sake has become what he was not; without departing from his own nature he shared in our matter; wishing to fill the world on high, Christ was born in two natures.
-Kathisma from the Orthros of the Nativity of Christ
(source)
  

Through the prayers of our Holy Fathers, Lord Jesus Christ our God, have mercy on us and save us! Amen!