Thus God’s people, exposed to the deceptive power and unsleeping malice of the prince of darkness, and in conflict with all the forces of evil, are assured of the unceasing guardianship of heavenly angels. Nor is such assurance given without need. If God has granted to His children promise of grace and protection, it is because there are mighty agencies of evil to be met—agencies numerous, determined, and untiring, of whose malignity and power none can safely be ignorant or unheeding. (GC 513.1) MC VC

Evil spirits, in the beginning created sinless, were equal in nature, power, and glory with the holy beings that are now God’s messengers. But fallen through sin, they are leagued together for the dishonor of God and the destruction of men. United with Satan in his rebellion, and with him cast out from heaven, they have, through all succeeding ages, co-operated with him in his warfare against the divine authority. We are told in Scripture of their confederacy and government, of their various orders, of their intelligence and subtlety, and of their malicious designs against the peace and happiness of men. (GC 513.2) MC VC

Old Testament history presents occasional mention of their existence and agency; but it was during the time when Christ was upon the earth that evil spirits manifested their power in the most striking manner. Christ had come to enter upon the plan devised for man’s redemption, and Satan determined to assert his right to control the world. He had succeeded in establishing idolatry in every part of the earth except the land of Palestine. To the only land that had not fully yielded to the tempter’s sway, Christ came to shed upon the people the light of heaven. Here two rival powers claimed supremacy. Jesus was stretching out His arms of love, inviting all who would to find pardon and peace in Him. The hosts of darkness saw that they did not possess unlimited control, and they understood that if Christ’s mission should be successful, their rule was soon to end. Satan raged like a chained lion and defiantly exhibited his power over the bodies as well as the souls of men. (GC 513.3) MC VC