When Christ revealed to Peter the time of trial and suffering that was just before Him, and Peter replied, “Be it far from Thee, Lord: this shall not be unto Thee” (Matthew 16:22), the Saviour commanded, “Get thee behind me, Satan” (Matthew 16:23). Satan was speaking through Peter, making him act the part of the tempter. Satan’s presence was unsuspected by Peter, but Christ could detect the presence of the deceiver, and in His rebuke to Peter He addressed the real foe. (2SM 353.1) MC VC

On one occasion, speaking to the twelve, and referring to Judas, Christ declared, “One of you is a devil” (John 6:70). Often in the days of His earthly ministry the Saviour met His adversary in human form, when Satan as an unclean spirit took possession of men. Satan takes possession of the minds of men today. In my labors in the cause of God, I have again and again met those who have been thus possessed, and in the name of the Lord I have rebuked the evil spirit. (2SM 353.2) MC VC

It is not by force that Satan takes possession of the human mind. While men sleep, the enemy sows tares in the church. While men are spiritually sleeping, the enemy accomplishes his work of iniquity. It is when his subject “understandeth it not” (Matthew 13:19) that he catcheth away the good seed sown in the heart. When men and women are in this condition, when their spiritual life is not being constantly fed by the Spirit of God, Satan can imbue them with his spirit, and lead them to work his works.... (2SM 353.3) MC VC

I entreat that there may be a putting away from the life every action which does not bear the approval of God. We are drawing near to the close of earth’s history; the battle is growing daily more fierce.—Letter 244, 1907. (2SM 353.4) MC VC