What does the Bible say about Satan's reality?

Scripture makes it clear that Satan is not merely a metaphor for evil, but a real being who opposes God and seeks to deceive humanity. He was created by God with a purpose, acting as an adversary who attempts to undermine God's kingdom. In James 4:7, believers are called to resist the devil, affirming his active role in spiritual warfare. Satan's ultimate destruction is prophesied, as seen in Revelation 20:10, confirming that he is under God's sovereign control and destined for defeat.