A man believed to be possessed by demons.
The Bible clearly indicates that people can be possessed by demons but that the demons respond to Jesus's authority. It also indicates that demons can possess animals. The literal view of demonization is still held by a number of Christian denominations. Catholic doctrine affirms that demonic oppression can occur apart from mental illness, and stresses that cases of mental illness should not be misdiagnosed as demonic influence.
There are many references to the demon possessed in the Bible.
Matthew 4:23-25: Demon-possessed persons are healed by Jesus (also Luke 6:17-19).
Matthew 7:21-23: Many will drive out demons in Jesus' name (also Mark 16:17; Luke 10:17; Acts 5:16; 8:7).
Matthew 8:14-17: Jesus healed many demon-possessed (also Mark 1:29-39; Luke 4:33-41).
Matthew 8:28-34: Jesus sent a herd of demons from two men into a herd of pigs ("about two thousand" pigs, according to the account at Mark 5:1-20; both Mark's account and Luke 8:26-39, mention only the one man).
Matthew 9:32-34: Jesus made a demon-possessed mute man speak, the Pharisees said it was by the power of Beelzebub (also Mark 3:20-22).
Matthew 10:1-8: The Twelve Apostles given the authority to drive out evil spirits (also Mark 3:15; 6:7; 6:13; Luke 9:1; 10:17).
Matthew 11:16-19: "this generation" said that John the Baptist was possessed by a demon (also Luke 7:31-35).
Matthew 12:22-32: Jesus healed a demon-possessed blind and dumb man (also Luke 11:14-23; 12:10; Mark 3:20-30).
Matthew 12:43-45: Jesus told an allegory of nasty spirits coming back home, that is, to the human body where they have lived before (also Luke 11:24-26).
Matthew 15:21-28: Jesus expelled a demon from the body of the daughter of a Canaanite woman (also Mark 7:24-30).
Matthew 17:14-21: Jesus healed a lunatic by driving out a demon from him (also Mark 9:14-29; Luke 9:37-49).
Mark 1:21-28: Jesus expelled a nasty spirit from a man (also Luke 4:31-37).
Mark 9:38-40: A non-Christian is seen driving out demons in Jesus' name (also Luke 9:49-50).
Mark 16:9: Jesus had driven seven demons out of Mary Magdalene (also Luke 8:2).
Luke 7:21: Many people are cleansed from evil spirits by Jesus.
Luke 13:10-17: Jesus expelled a spirit of disease from the body of a woman on the Sabbath.
Luke 13:31-32: Jesus continued to cast out demons even though Herod Antipas wanted to kill him.
Luke 22:3: Satan entered into Judas Iscariot (also John 13:27).
Acts 5:16: The Apostles healed those tormented by evil spirits.
Acts 8:6-8: At the teaching of Philip the Evangelist in Samaria, evil spirits came out of many.
Acts 8:18-19: Simon Magus offered to buy the power of Laying on of hands.
Acts 10:38: St. Peter said Jesus healed all who were under the power of the devil.
Acts 16:16-24: Paul and Silas were imprisoned for driving a future-telling spirit out of a slave girl.
Acts 19:11-12: Handkerchiefs and aprons touched by Paul cured illness and drove out evil spirits.
Acts 19:13-20: Seven sons of Sceva attempted to drive out evil spirits by saying: "In the name of Jesus, whom Paul preaches, I command you to come out." But because they did not have faith in Jesus, they were unsuccessful and were actually driven from that house by the possessed.
Revelation 18:2: The Whore of Babylon is a home for demons, evil spirits and unclean birds.