Thankfully, Jesus rules above Satan and demons, and has defeated their hold on us through his sinless life, substitutionary death, bodily resurrection, and exultation to the throne. He sits in heaven today, where he rules over everyone and everything including Satan and demons. While Satan is ultimately defeated, he is still trying to war against us and against God, much like a foreign king who has lost the war but has yet to surrender. Skirmishes continue as enemy soldiers and snipers continue their assault, but in Christ, we do not have to be defeated, this is victory and authority or power victory and authority. We get into trouble when we forget this fact and instead give Satan a foothold, inviting him to have authority in our lives.
– Driscoll, Mark; Who Do You Think You Are? Finding Your True Identity in Christ; Thomas Nelson Publishers, Nashville, copyright 2013; Page 72