What does the Bible say about the defeat of Satan?

The Bible makes it very clear that Satan is a defeated enemy, primarily through the work of Jesus Christ. In Hebrews 2:14, it states, 'Forasmuch then as the children are partakers of flesh and blood, he also himself likewise took part of the same; that through death he might destroy him that had the power of death, that is, the devil.' This passage emphasizes that Christ, through His sacrificial death, defeated the power of Satan and death, offering believers victory over sin and spiritual death. While Satan may still actively tempt and oppose God's people, his ultimate fate is sealed, and he exercises power only where God permits within His sovereign will. Thus, we can face spiritual battles with confidence, knowing that our Savior has already secured our victory.