How do we know God's power over Satan is true?

Scriptural evidence assures believers of God's ultimate dominion and power over Satan. In Romans 16:20, the promise that the 'God of peace shall bruise Satan under your feet shortly' signifies a future assurance of victory for all believers. Throughout the New Testament, we see Christ's victory over Satan in the crucifixion and resurrection, rooted in biblical prophecies like Genesis 3:15, signifying that while Satan actively opposes God, his fate is sealed by God’s sovereign decree. This was further emphasized in Luke 10:18, with Jesus stating He saw Satan fall from heaven, underscoring the decisive defeat the devil has already faced.