Father Fortea, why does Satan appear more frequently in the New Testament than in the Old?
I believe that this is because the Lord did not want to infuse fear into His chosen people. Also, He wanted to prevent false, dualistic beliefs about good and evil from taking root among them – i.e., the belief in a “god of good” and a “god of evil.” That is why God gives the demons a lower profile in the Old Testament than in the New. God Himself is the central figure of the Old Testament, and the angelic world only appears on a certain number of occasions so as not to encourage idolatry. Nevertheless, in the New Testament, divine revelation is completed and the existence of this spiritual world is shown in a more profound way. With the coming of Jesus, the kingdom of God was at hand; He was reclaiming the world from slavery to sin and the temptations of the devil.
Editor’s Note: To learn more about spiritual warfare and demonology, Catholic Spiritual Direction recommends Fr. Fortea’s excellent book, Interview With An Exorcist – An Insider’s Look at the Devil, Demonic Possession, and the Path to Deliverance.