Do (Orthodox/Mainstream) Christians believe in demonic possesion?
Also, why is it a common theme in folklore to "sell ones' soul" to the devil? Is that any different than demonic possesion or somewhat of an equally bad opposite scenario?
Even more hypothetically speaking: What if a person sold his or her soul so they could "do whatever the hell they wanted?" Most theologans would obviously say having that kind of "freedom" would be easier if the person was to accept God, but obviously there are people who choose that path for whatever reason, regardless...