What does the Bible say about demon possession?

The Bible describes demon possession as a state in which individuals are controlled by unclean spirits, as illustrated in Mark 5 with the story of the Mad Gadarene. This man was tormented by demons to the extent that no one could bind him, and he lived among the tombs. Intriguingly, even the demons recognized Jesus as the Son of the Most High God and understood their subjugation to Him. This account emphasizes that while Satan and his agents may seem powerful, they are ultimately subject to the authority of Christ, who commands them as He does the winds and the sea (Matthew 8:27).