Heathen = nations.
Sometimes the wise men from the east (Matthew 2) who honored the Lord Jesus are linked with the idea of 'the desire of nations' (Haggai 2.7) who shall come.
"Hark! the herald angels sing,
“Glory to the new-born King;
Peace on earth, and mercy mild;
God and sinners reconciled.”
Joyful, all ye nations, rise,
Join the triumph of the skies;
With angelic hosts proclaim,
“Christ is born in Bethlehem.”
2
Christ, by highest heav’n adored,
Christ, the everlasting Lord:
Late in time behold Him come,
Offspring of a virgin’s womb.
Veiled in flesh the Godhead see,
Hail th’ incarnate Deity!
Pleased as man with man to dwell,
Jesus our Immanuel.
3
Hail the heav’n-born Prince of Peace!
Hail the Sun of righteousness!
Light and life to all He brings,
Ris’n with healing in His wings:
Mild He lays His glory by,
Born that man no more may die;
Born to raise the sons of earth;
Born to give them second birth.
4
Come, Desire of nations, come!
Fix in us Thy humble home:
Rise, the woman’s conqu’ring seed,
Bruise in us the serpent’s head;
Adam’s likeness now efface,
Stamp Thine image in its place:
Final Adam from above,
Reinstate us in Thy love."
Hymn: Hark! the herald angels sing
