Many iterations and interpretations of his role exist. In the Hebrew Bible, he is referred to as ha-satan, or "the adversary", and is seen as someone who works for the heavenly court and brings human's sins to light. This version of Satan may not actually be a demon, but rather more of a lawyerly character who corrects the moral mistakes of men and God. Some also speculate that Satan's place in The Bible was a metaphor for Emperor Nero; based on the theory the number 666 was actually a code that spells out "Nero Caesar", rather than him being an actual entity. The commonly used name Lucifer is most likely in reference to the morning star Venus, thus making it unlikely he was a cast-out angel.