Floating on the sea of night
I seek out mortal men
To tell them of a wondrous sight
Within the dark, a guiding light
Awaiting all of them.
"Be not afraid!" I softly call
"The Son of God is born!"
Then turn to listen, one and all
And to their knees they softly fall
Before the break of morn.
I'll guide them, and the Magi, too,
The star will light my way
They'll gasp to see the infant coo--
As any who might see would do--
The Savior born this day.
Who am I?
(Yesterday's answer: Christmas Tree.)