In Paradise Lost, Milton describes how Lucifer rebelled against God and was cast into Hell as a result. I've always wondered about the origin of this account since as far as I know, it's not mentioned anywhere in the Bible. Is it part of the Catholic creed (or the creed of any Christian denomination?) If so, what is the basis for it?
A partial answer may be found in Isaiah 14:12-15.
Some interpret the fallen one as Lucifer, since in this passage he rebelled against God and attempted to set himself above God. He was cast down and thrown into the realm of the dead.