How does Jesus' death defeat the power of Satan?

The death of Jesus Christ on the cross signifies the ultimate defeat of Satan's power. By bearing the sins of the world, Jesus effectively nullified the accusations against His people and shattered the hold that sin and death had over humanity. As laid out in Scripture, He crushed the serpent’s head, thereby rendering Satan a defeated enemy. For believers, this means that they no longer live under the dominion of sin or fear death, as Christ's resurrection guarantees their eternal life and victory. This transformed state empowers believers to live in the light of His victory, as they are now indwelt by the Spirit, who enables them to walk in righteousness.