The existence of Satan is a topic that has been debated and discussed throughout history. The Bible teaches that Satan is a real spiritual being who seeks to lead people away from God and into sin. The New Testament refers to Satan as the “ruler of this world” (John 12:31) and the “god of this age” (2 Corinthians 4:4). The book of Revelation portrays Satan as a dragon who deceives the whole world (Revelation 12:9).