Is it possible for a Believer to be demon possessed? Is a question that is sometimes asked. The answer is "No!". It may seem to be that way, but that's a lie of the devil - but be assured.
The absolute truth for everyone who believes, has repented of sin and received Christ is this: our heavenly Father "has
delivered us from the power of darkness and conveyed us into the kingdom of the Son of His love,
in whom we have redemption through His blood, the forgiveness of sins," Colossians 1'13-14.
This is the truth. However, a Believer who is experiencing frequent distressing disturbances may be deceived by the enemy into thinking otherwise.
Nevertheless, because of this powerful basic truth complete deliverance is at hand. Believers are in "the Kingdom of the Son of His love". Amen!