Sometimes Christmas joy doesn't seem to meet with the reality of life. I know that I've had Christmases that seem so. So perhaps for that reason this song has been done so many ways (I've included here two of the most popular). I know I find the lyrics of "I Heard the Bells on Christmas Day" so comforting, especially the lines "God is not dead / nor doth He sleep. Wrong shall fail / Right shall prevail." May they also encourage you this Christmas Eve, wherever it may find you.
(By the way, Longfellow's story behind the song is also pretty fascinating, and worth the while to look up.)