Isaiah 9:2, 6-7 (NIV):
The people walking in darkness have seen a great light; on those living in the land of the shadow of death a light has dawned.
For to us a child is born, to us a son is given, and the government will be on his shoulders. And he will be called Wonderful, Counselor, Mighty God, Everlasting Father, Prince of Peace. Of the increase of his government and peace there will be no end. He will reign on David's throne and over his kingdom, establishing and upholding it with justice and righteousness from that time on and forever. The zeal of the LORD Almighty will accomplish this.
This passage forms one of my favourite parts of Handel's Messiah (yes, I am eclectic), but also a beautiful image of the coming of Messiah. A 'great light' on those in darkness, revealed in the birth of a child.
Here, in Advent, we wait in the dark for the light to shine.