Can a Christian have a demon spirit in them?
No, because we have someone abiding in us who is stronger than Satan or the demons. Matthew 12:25-29 says, “And Jesus knew their thoughts, and said unto them, Every kingdom divided against itself is brought to desolation; and every city or house divided against itself shall not stand: And if Satan cast out Satan, he is divided against himself; how shall then his kingdom stand? And if I by Beelzebub cast out devils, by whom do your children cast them out? therefore they shall be your judges. But if I cast out devils by the Spirit of God, then the kingdom of God is come unto you. Or else HOW CAN ONE ENTER INTO A STRONG MAN’S HOUSE, and spoil his goods, EXCEPT HE FIRST BIND THE STRONG MAN? and then he will spoil his house.”
The One abiding in us is the Holy Spirit. Ephesians 4:30 says, “And grieve not the holy Spirit of God, whereby ye are sealed unto the day of redemption.” I Corinthians 3:16 says, “Know ye not that ye are the temple of God, and that the Spirit of God dwelleth in you?” I John 4:4 says, “Ye are of God, little children, and have overcome them: because greater is he that is in you, than he that is in the world.” We are “God’s house and temple,” and Satan cannot enter us because One who is stronger than he abides therein.