What Are The Carolers Singing?

What Are The Carolers Singing?
 

 They are heralding the fact that
Jesus is the King!

 What Child Is This?

What Child is this, who laid to rest
On Mary's lap is sleeping?
Whom angels greet with anthems sweet
While shepherd’s watch are keeping?

 
This, this is Christ the King,
Whom shepherds guard and angels sing.
Haste, haste to bring Him laud,
The Babe, the Son of Mary.