“The casting down of Satan as an accuser of the brethren in heaven was accomplished by the great work of Christ in giving up His life. Notwithstanding Satan’s persistent opposition, the plan of redemption was being carried out. Man was esteemed of sufficient value for Christ to sacrifice His life for him.Satan, knowing that the empire he had usurped would in the end be wrested from him, determined to spare no pains to destroy as many as possible of the creatures whom God had created in His image. He hated man because Christ had manifested for him such forgiving love and pity, and he now prepared to practice upon him every species of deception by which he might be lost; he pursued his course with more energy because of his own hopeless condition.”
Spirit of Prophecy Vol.3 p.194-195