Demons are fallen angels who rebelled against God and chose to follow Satan. They were originally created as good beings but became evil after their rebellion. Demons have levels and different purposes in their spiritual hierarchy. They can possess (demonize) humans, influencing their thoughts, actions, and words. Demons have the ability to confuse and deceive people, often tempting them to sin and abandon their faith. They can also manipulate humans by provoking visions and influencing their desires. Demons are not all-powerful like God and can be expelled through spiritual intervention, but caution must be taken to ensure proper spiritual care to avoid worsening the situation. Examples of demons mentioned in the Bible include Satan, Molech, and Legion.