https://en.wikipedia.org/wiki/Spirit_possessionChristianity
See also: Baptism with the Holy Spirit and Holy laughter
Further information: Exorcism in Christianity
From its beginning, Christianity has held that possession derives from the Devil, i.e. Satan, his lesser demons, the fallen angels.[6] In the battle between Satan and Heaven, Satan is believed to engage in "spiritual attacks", including demonic possession, against human beings by the use of supernatural powers to harm them physically or psychologically.[1] Prayer for deliverance, blessings upon the man or woman's house or body, sacraments, and exorcisms are generally used to drive the demon out.Some theologians, such as Ángel Manuel Rodríguez, say that mediums, like the ones mentioned in Leviticus 20:27, were possessed by demons. Another possible case of demonic possession in the Old Testament includes the false prophets that King Ahab relied upon before re-capturing Ramoth-Gilead in 1 Kings 22. They were described as being empowered by a deceiving spirit.[7]
The New Testament mentions several episodes in which Jesus drove out demons from persons.[6] Whilst most Christians believe that demonic possession is an involuntary affliction,[8] some biblical verses have been interpreted as indicating that possession can be voluntary. For example, Alfred Plummer writes that when Devil entered into Judas Iscariot in John 13:27, this was because Judas had continually agreed to Satan's suggestions to betray Jesus and had wholly submitted to him.[9]
The New Testament indicates that people can be possessed by demons, but that the demons respond and submit to Jesus Christ's authority:
In the synagogue, there was a man possessed by a demon, an evil spirit. He cried out at the top of his voice, "Ha! What do you want with us, Jesus of Nazareth? Have you come to destroy us? I know who you are—the Holy One of God!" "Be quiet!" Jesus said sternly. "Come out of him!" Then the demon threw the man down before them all and came out without injuring him. All the people were amazed and said to each other, "What is this teaching? With authority and power he gives orders to evil spirits and they come out!" And the news about him spread throughout the surrounding area
— Luke 4:33-35[10]
It also indicates that demons can possess animals as in the exorcism of the Gerasene demoniac.