Christian demonology is the study of demons based on the teachings found in the Bible. Christian demonology helps provide important answers regarding what demons are, their activities, their identity, their power, and their final destiny.
Today, many people deny the existence of Satan and demons or believe that Satan is only a personification of evil. A study of Christian demonology helps in understanding the Bible's teachings regarding the reality and activities of demons. Further, Ephesians 6:12 is clear that the Christian life is a spiritual battle in the heavenly realms: "For we do not wrestle against flesh and blood, but against the rulers, against the authorities, against the cosmic powers over this present darkness, against the spiritual forces of evil in the heavenly places." Yet 1 John 4:4 reminds us that God's power far exceeds that of any demon: "Little children, you are from God and have overcome them, for he who is in you is greater than he who is in the world."