What does the Bible say about the battle between good and evil?

In Luke 11:21-26, Jesus illustrates the battle between the strong man, representing the devil, and Himself as the stronger man who overcomes the stronghold of evil. This passage emphasizes the cosmic struggle between light and darkness, showcasing that while the devil may seem fortified in his hold over individuals, the Lord Jesus has the power to dismantle that fortification and liberate the oppressed. The sovereignty of Christ comes through when He exercises His authority to cast out demons, demonstrating that He is the one who truly conquers and defeats evil forces.