SCRIPTURAL EVIDENCE FOR THE EXISTENCE OF SATAN, THE DEVIL AND DEMONS
We think it is reasonable to say that Christians accept the existence of Satan, the Devil and demons primarily because of evidence found in the New Testament. Christians therefore default to accepting that these spiritual entities are real because they interpret everything written there literally.
Jews, of course, do not accept the teachings of the New Testament, and that may explain why they are quite silent on the subject — even though the Old Testament has its share of scriptures that identify Satan and the Devil as real characters. But instead of looking for the symbolic meaning of Satan and the Devil, Jews appear to just dismiss them from consideration because there is only one God and they, as other gods cannot possibly exist. It may also be true that Jews exclude Satan and the Devil from their theology simply because Christians include them. This fits with the general practice of Jews to categorically dismiss almost everything that Christians hold dear.
With this tendency to interpret all scripture literally, it is not surprising that people believe in the devil/satan. Consider these scriptures:
1 John 5:19: We know that we are of God, and the whole world is in the power of the evil one.
COMMENTARY: See The World.
2 Corinthians 4:4:In their case the god of this world has blinded the minds of the unbelievers, to keep them from seeing the light of the gospel of the glory of Christ, who is the likeness of God.
COMMENTARY: See Blindness.
Considering the literal content of these scriptures, it is impossible to imagine that Satan, the devil, and demons are not real. Unfortunately, many well-meaning religionists have made this error. This is another example of how the The Law (i.e. the written word) is A Stumbling Block. Taken literally, these scriptures lead us to a set of doctrinal conclusions that deflect responsibility for our behaviors to external, evil forces who tempt and deceive us to do things we would not otherwise do. Taken symbolically, however, we come to another set of conclusions about our covenant relationship to God. Understanding the difference between the two doctrines is critical to our spiritual lives.