I think I have to agree with Janus Double. The song certainly isn't about "some Roman king" (the way my colleague suggested). It's about someone who had it all, enjoyed his power and popularity, but enjoyed it just too much and let himself do things so that he lost everybody near him ("Now in the morning I sleep alone"). And he says it just wasn't worth it, it wasn't about the power. I really love the biblical comparisons, even though I'm not christian myself.