What does the Bible say about the power of the devil?

Scripture portrays the devil as having considerable power and sovereignty over wicked men and spiritual forces. The title 'Prince of the power of the air' (Ephesians 2:2) highlights his dominion over those who are in rebellion against God. Similarly, in John 14:30, Jesus refers to him as the 'Prince of this world,' indicating not only his authority in the spiritual realm but also his pervasive influence over the hearts of the ungodly. The devil's reign is seen in various manifestations of evil and tyranny that oppress humanity, reflecting his role as the master of mis-rule.