How do we know Christ's victory over Satan is true?

Luke 11 provides evidence of Christ's authority as the 'stronger man' who confronts and overcomes the stronghold of Satan. Throughout His ministry, Jesus performed miracles that signified this victory; these acts were not merely physical healings but also spiritual declarations of His dominion over evil. Importantly, Christ's ultimate victory was accomplished at the cross, where He vanquished sin and death. As believers, we recognize that our hope and assurance lie in the completed work of Christ, fulfilling the promises made throughout the Scriptures concerning His ability to conquer evil.