The origin of demons in the Bible traces back to the fall of certain angels who rebelled against God. Scriptures describe these beings as once holy angels who, led by Satan, chose to defy divine authority, resulting in their expulsion from heaven. Their rebellion transformed them into malevolent entities opposed to God’s will, seeking to influence and corrupt humanity. Biblical accounts, particularly in books like Genesis, Isaiah, and Revelation, illustrate how these fallen angels became demons, acting as tempters and adversaries. Understanding the origin of demons in the Bible offers insight into the spiritual battles described in scripture and the nature of evil from a biblical perspective.