Spirit possession
Christianity
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.
Christianity
The New Testament mentions several episodes in which Jesus drove out demons from persons. Whilst most Christians believe that demonic possession is an involuntary affliction, some biblical verses have been interpreted as indicating that possession can be voluntary. For example, Alfred Plummer writes that when Satan 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.
Christianity
The New Testament indicates that people can be possessed by demons, but that the demons respond and submit to Jesus Christ's authority: