He has power to bring before men the appearance of their departed friends. The counterfeit is perfect; the familiar look, the words, the tone, are reproduced with marvelous distinctness. Many are comforted with the assurance that their loved ones are enjoying the bliss of heaven, and without suspicion of danger, they give ear “to seducing spirits, and doctrines of devils.” (GC 552.1) MC VC

When they have been led to believe that the dead actually return to communicate with them, Satan causes those to appear who went into the grave unprepared. They claim to be happy in heaven and even to occupy exalted positions there, and thus the error is widely taught that no difference is made between the righteous and the wicked. The pretended visitants from the world of spirits sometimes utter cautions and warnings which prove to be correct. Then, as confidence is gained, they present doctrines that directly undermine faith in the Scriptures. With an appearance of deep interest in the well-being of their friends on earth, they insinuate the most dangerous errors. The fact that they state some truths, and are able at times to foretell future events, gives to their statements an appearance of reliability; and their false teachings are accepted by the multitudes as readily, and believed as implicitly, as if they were the most sacred truths of the Bible. The law of God is set aside, the Spirit of grace despised, the blood of the covenant counted an unholy thing. The spirits deny the deity of Christ and place even the Creator on a level with themselves. Thus under a new disguise the great rebel still carries on his warfare against God, begun in heaven and for nearly six thousand years continued upon the earth. (GC 552.2) MC VC

Many will be confronted by the spirits of devils personating beloved relatives or friends and declaring the most dangerous heresies. These visitants will appeal to our tenderest sympathies and will work miracles to sustain their pretensions. We must be prepared to withstand them with the Bible truth that the dead know not anything and that they who thus appear are the spirits of devils. (GC 560.1) MC VC

Just before us is “the hour of temptation, which shall come upon all the world, to try them that dwell upon the earth.” Revelation 3:10. All whose faith is not firmly established upon the word of God will be deceived and overcome. Satan “works with all deceivableness of unrighteousness” to gain control of the children of men, and his deceptions will continually increase. But he can gain his object only as men voluntarily yield to his temptations. Those who are earnestly seeking a knowledge of the truth and are striving to purify their souls through obedience, thus doing what they can to prepare for the conflict, will find, in the God of truth, a sure defense. “Because thou hast kept the word of My patience, I also will keep thee” (verse 10), is the Saviour’s promise. He would sooner send every angel out of heaven to protect His people than leave one soul that trusts in Him to be overcome by Satan. (GC 560.2) MC VC

The prophet Isaiah brings to view the fearful deception which will come upon the wicked, causing them to count themselves secure from the judgments of God: “We have made a covenant with death, and with hell are we at agreement; when the overflowing scourge shall pass through, it shall not come unto us: for we have made lies our refuge, and under falsehood have we hid ourselves.” Isaiah 28:15. In the class here described are included those who in their stubborn impenitence comfort themselves with the assurance that there is to be no punishment for the sinner; that all mankind, it matters not how corrupt, are to be exalted to heaven, to become as the angels of God. But still more emphatically are those making a covenant with death and an agreement with hell, who renounce the truths which Heaven has provided as a defense for the righteous in the day of trouble, and accept the refuge of lies offered by Satan in its stead—the delusive pretensions of spiritualism. (GC 560.3) MC VC