If we just apply a little bit of logic and reason to the question, I think the idea of Satan as a distinct, sentient being makes no sense.
Here we have this once high-ranking angel, that God created, who was appointed as the "covering cherub" over the earth. Somehow, he lost all sense of reason, everything that God gave him...all sense of love, compassion, justice, etc., and became the total opposite. All of a sudden, he exists for no other reason than to cause misery, suffering, pain...etc.... and for what reason? He was JEALOUS of God. Did this angel never learn ANYTHING??? Did he think he was the rightful ruler of the universe when he KNOWS he had nothing to do with creating it? Does that make sense???
But, what else is the devil famous for? Trying to tempt people to indulge in PLEASURE. Now, who is it that GAVE you that body that craves this pleasure? So, now we have this God who gave us these bodies that crave pleasure, but then we're told that we're not allowed to indulge unless it is under strict guidelines set by God....marriage, moderation, etc...but where do these desires originate? The MIND!! The FLESH!! It has nothing to do with ANYTHING OR ANYBODY ELSE! There is NO ONE ELSE TO BLAME! And when OTHER bring people THEIR evil into OUR lives, where does THAT come from? Their OWN minds! Their OWN flesh! Their OWN desires! (Listen to the Dalai Lama, HE makes sense.)
Everyone in our world is evolving into God. There cannot be evolution without an adversary to evolution. Satan is the adversary, and Satan is NON-EXISTANT without human consciousness.
~PS