 Yes, absolutely believers can come under the power of a demon. The Bible would point to and allude to the fact that deliverance is actually for Christians. No, my friend, clearly Christians cannot have a demon. When the Bible speaks of deliverance, the Bible speaks of someone being free indeed. The word in John 8.36, free indeed, indeed is on toast, which is continually, which is thoroughly, truly. If you look at Mark 1.39, Jesus went from synagogue to synagogue, casting of demons. So let me get this straight. Wherever Jesus went, he cast out demons. But Jesus tells the disciples that he will be in us, meaning he's in us. So everywhere Jesus goes, he cast demons out, except in us. How does that make any sense? It doesn't, because as he says, if you are Christian, if you have Christ, you are free indeed, free from demons and prayerfully free from people who cannot teach the Bible.