In the tradition of "Frosty the Snowman", it's a song about a sentient object at Christmas time. but while the story involves Santa and the North Pole, I came away seeing Christological significance as well. Give a listen to the song below, and then I'll elucidate.
That was cute, right? Did you enjoy it?
When I was in high school, I remember that someone in my sister's class once wrote a paper on how Frosty the Snowman is a Christ figure (particularly in the animated special). He gives his life to save a little girl, then is reborn and in the end he ascends to the sky (on Santa's sleigh). "And he waved goodbye saying, 'Don't you cry. I'll be back again someday.'"
Similarly, I found Joel the Lump of Coal to represent Christ's mission on earth. He comes somewhat reluctantly but does the will of Santa (shadows of Gethsemane?) and in the end his presence makes the naughty boy aware of his sin, but Joel doesn't leave things that way. Joel knows he was sent for a purpose, and he tells the kid to put all his pain onto him. Like Jesus on the cross, Joel takes on the boy's sin on himself as it were, and in doing so he gives his life. But he is reborn as a brilliant diamond, and the boy is changed, now with great reward. Isn't that a beautiful representation of what Christ does? In a way, is that not what Christmas is all about?
I must say, I was rather moved by Joel the Lump of Coal. That's a song I wouldn't mind hearing on the radio, and I've already bought it on iTunes. I hope all your Christmases are filled with warm feelings and that those things that seem lousy turn out to bring you joy, and if you feel like an unloved lump of coal, find your purpose and shine bright.