Ephrem the Syrian (recommended reading from John Wesley, of all people; d. 373) wrote the following hymns on the Incarnation:
From Hymn 8
Blessed is the Messenger who came bearing
a great peace. By the mercy of His Father,
He lowered Himself to us. Our own debts
He did not take up to Him. He reconciled
[His] Lordship with His chattels.
Refrain: Glory to Your Dawn, divine and human.
Glorious is the Wise One Who allied and joined
Divinity with humanity,
one from the height and the other from the depth.
He mingled the natures like pigments
and an image came into being: the God-man.
O Zealous One who saw Adam
who became dust and the accursed serpent
eating him. Reality dwelt
in what had lost its flavor. He made him salt
by which the cursed serpent would be blinded.
Blessed is the Compassionate One Who saw, next to paradise,
the lance that barred the way
to the Tree of Life. He came to take up
the body that would be struck so that by the opening in His side
He might break through the way into paradise.
From Hymn 12
Who indeed has seen the Babe Who is more ancient
than His bearer? The Ancient One entered
and became young in her. He emerged an infant
and grew by her milk. He entered and became small in her;
He emerged and grew through her—a great wonder!