Matt. 12
In the same way that Christians can be filled with God’s Holy Spirit, so also can demon spirits possess humans. That’s a chilling thought, but true. Matthew 12 implies that they actively look for people to live in and operate through.
They see a human as a house to live in. This is one reason why Christians must be filled with God’s Holy Spirit and His Word to guard against being occupied by the Devil’s imps.
Hypothetically, if persons resist the Lord and His Word, doesn’t it stand to reason that they are ripe for the opposite spiritual power to abide in them? I think so.
Jesus gave His Disciples the power and authority to cast them out of people. The power is in His Name. Use it!