Lucifer was cast out of heaven because he rebelled against God due to pride and a desire to exalt himself above God. According to Christian theology and biblical passages (notably Ezekiel 28 and Isaiah 14), Lucifer was once a beautiful and perfect angel but became proud of his own beauty and wisdom. This pride led him to corrupt his wisdom and rebel against God's authority, attempting to be like God or above Him. As a result, God expelled Lucifer and the angels who followed him from heaven. This fall transformed Lucifer into Satan, who then sought to oppose God by tempting humanity to sin, continuing a cosmic conflict between good and evil. Key reasons for Lucifer's expulsion include:
- Sinful pride and desire to be worshiped like God.
- Rebellion and defiance against God's law and authority.
- Misrepresentation of God's character and sowing discontent among angels.
- Leading a third of the angels into rebellion, resulting in a war in heaven.
Lucifer's fall is described as a severe consequence of his self-generated pride, which marked the origin of sin in the universe. Even after his expulsion, he maintained some access to heaven but lost his place of authority and became the adversary of God and humanity known as Satan.
