If Satan sees he is in danger of losing one soul, he will exert himself to the utmost to keep that one. And when the individual is aroused to his danger, and, with distress and fervor, looks to Jesus for strength, Satan fears he shall lose a captive, and he calls a re-enforcement of his angels to hedge in the poor soul, and form a wall of darkness around him, that heaven’s light may not reach him. But if the one in danger perseveres, and in helplessness and weakness casts himself upon the merits of the blood of Christ, Jesus listens to the earnest prayer of faith, and sends a re-enforcement of those angels which excel in strength to deliver him. (MYP 53.1) MC VC

Satan cannot endure to have his powerful rival appealed to, for he fears and trembles before His [Christ’s] strength and majesty. At the sound of fervent prayer, Satan’s whole host trembles.... And when angels, all-powerful, clothed with the armory of heaven, come to the help of the fainting, pursued soul, Satan and his host fall back, well knowing that their battle is lost.—The Review and Herald, May 13, 1862. (MYP 53.2) MC VC