Many endeavor to account for spiritual manifestations by attributing them wholly to fraud and sleight of hand on the part of the medium. But while it is true that the results of trickery have often been palmed off as genuine manifestations, there have been, also, marked exhibitions of supernatural power. The mysterious rapping with which modern spiritualism began was not the result of human trickery or cunning, but was the direct work of evil angels, who thus introduced one of the most successful of soul-destroying delusions. Many will be ensnared through the belief that spiritualism is a merely human imposture; when brought face to face with manifestations which they cannot but regard as supernatural, they will be deceived, and will be led to accept them as the great power of God. DD 19.3
These persons overlook the testimony of the Scriptures concerning the wonders wrought by Satan and his agents. It was by satanic aid that Pharaoh's magicians were enabled to counterfeit the work of God. Paul testifies that before the second advent of Christ there will be similar manifestations of satanic power. The coming of the Lord is to be preceded by “the working of Satan with all power and signs and lying wonders, and with all deceivableness of unrighteousness.” 2 Thessalonians 2:9, 10. And the apostle John, describing the miracle-working power that will be manifested in the last days, declares: “He doeth great wonders, so that he maketh fire come down from heaven on the earth in the sight of men, and deceiveth them that dwell on the earth by the means of those miracles which he had power to do.” Revelation 13:13, 14. No mere impostures are here foretold. Men are deceived by the miracles which Satan's agents have power to do, not which they pretend to do. DD 19.4