“For our struggle is not against flesh and blood, but against the rulers, against the authorities, against the powers of this dark world and against the spiritual forces of evil in the heavenly realms.” Ephesians 6:12
The Narnia books are all about an alternate reality; another realm where there is a continual conflict between good and evil. C.S. Lewis was describing for us the spirit world that is actually around us all the time. Jesus lived physically and engaged physical realities, but He was equally conscious of the spirit realm and in a moment would expose and address darkness with complete authority.
Whether releasing a woman that Satan had bound for eighteen long years (See Luke 13), delivering a man so tormented that he lived in total isolation (See Luke 9), or rebuking His own disciples when they were listening to the wrong voice (See Mark 8); Jesus was never surprised by the need to address the alternate reality.
After He rose from the dead He entrusted those who believe His authority and gave as the first sign of believers: “In My Name, they will cast out demons.” (Mark 16:17) Have you embraced the alternate reality? It is easy in the American church to theologically believe in the spirit world but functionally live as if it’s “make believe” and irrational.
The problem is we will never win a war we haven’t fully engaged in. In fact, we will end up thinking flesh and blood is our enemy and feel the solution to our problems lies in manipulating people to get our way, or even, to get “God’s” way. (It is easy to equate our agenda with God’s will when we really want something.) This often leads to bitterness, frustration, or idolatry, and a life of striving which is actually under the influence of darkness instead of light.
“Get behind Me Satan; for you are not setting your mind on God’s interests, but man’s.” (Mark 8:33)