"The claim that Christianity makes for Christmas is that at a particular time and place God came to be with us Himself. When Quirinius was governor of Syria, in a town called Bethlehem, a child was born who, beyond the power of anyone to account for, was the high and lofty One made low and helpless. The One who inhabits eternity comes to dwell in time. The One whom none can look upon and live is delivered in a stable under the soft, indifferent gaze of cattle. The Father of all mercies puts Himself at our mercy."
Filling the world he lies in a manger.
In this poem written some 15 centuries ago, Augustine tried to capture the mystery of the Incarnation:
Maker of the sun,
He is made under the sun.
In the Father he remains,
From his mother he goes forth.
Creator of heaven and earth,
He was born on earth under heaven.
He is wisely speechless.
Filling the world,
He lies in a manger.
Ruler of the stars,
He nurses at his mother's bosom.
He is both great in the nature of God,
and small in the form of a servant.
Saint Augustine of Hippo (354-430)