He bowed the heavens…and came down.@Psalm 18:9
John M. Neale (1818–1866)

Cosmas the Melodist, 8th Century (Χριστὸς γεννᾶται δοξάσατε); translated from Greek to English by John M. Neale, Hymns of the Eastern Church (London: Spottiswoode & Company, 1862).

Hermann R. Schroeder, in Great Hymns of the Church Compiled by the Late Right Reverend John Freeman Young, edited by John H. Hopkins (New York: James Pott, 1887), number 67 (🔊 pdf nwc).

Cosmas the Melodist

Christ is born! Tell forth His fame!
Christ from Heaven! His love proclaim!
Christ on earth! Exalt His name!
Sing to the Lord, O world, with exultation!
Break forth in glad thanksgiving, every nation!
For He hath triumphed gloriously!

Man, in God’s own image made,
Man, by Satan’s wiles betrayed,
Man, on whom corruption preyed,
Shut out from hope of life and of salvation,
Today Christ maketh him a new creation,
For He hath triumphed gloriously!

For the Maker, when His foe
Wrought the creature death and woe,
Bowed the heav’ns, and came below,
And in the virgin’s womb His dwelling making,
Became true Man, man’s very nature taking;
For He hath triumphed gloriously!

He, the Wisdom, Word, and Might,
God, and Son, and Light of light,
Undiscovered by the sight
Of earthly monarch, or infernal spirit,
Incarnate was, that we might Heav’n inherit:
For He hath triumphed gloriously!