Art by Joe

Just a pic my friend Joe gave me to submit. I have no Idea where he got the idea to Draw this. In fact since I go to a private school he got in trouble for drawing something this 'demonic'.
From what I know(thats not alot) about this picture the skull and spine with the angel wings and crown of thorns is suposed to be angelic, and the skull and spine with the demonic wings and horns is suposed to be a demon. (who knew)