Satan isn't a christian concept and it never has been. The bible never says Satan, except in inaccurate translations (which would be most). It does say Lucifer, but for the most part the bible uses vague terms for the being. Satan is actually a figure in Persian theology, formerly known as Shaitan. The term was mistakingly thrown in and it has become enough of a buzzword nobody has bothered doing anything about it.
"If one has realized a truth, that truth is valueless so long as there is lacking the indomitable will to turn this realization into action!"
-A.H.
-A.H.