Then, why does God, who aspires to be lord of all creation, not bring Satan under His control? It is because Satan does not have God’s unchanging nature—quite the opposite. God is unchanging while Satan is always changing to suit himself. God is unique and Satan is not; God is eternal while Satan is temporal. This, in essence, is their dividing line.
Why, then, are human beings the objects of both God’s desire and Satan’s desire? People stand between God and Satan. They have qualities that can relate to both God’s world and Satan’s world.
Is someone who changes from moment to moment more on God’s side or Satan’s side? Is someone who is constantly creating divisions and fights in the home more susceptible to God or to Satan? What about the person who is immersed in his daily affairs and does not think about the whole, or the world, or history, or eternity, or any kind of long-term vision? What about a father who neglects his wife and children, who only goes off to the local bar and drinks every night, seeking his own pleasure? Certainly, Satan will claim such people. (124:243-44, February 20, 1983)
We are living in a fallen realm. That is why we need to live a life of faith. Remember this, and always be aware that Satan governs this fallen world. This is not merely a concept; it is reality. (161:218, February 15, 1987)
The Bible exhorts us to pray ceaselessly. The Devil can attack us and even work through us twenty-four hours a day. Although God is with us, He stays in a vertical relationship with only the mind as His base; how effectively, then, can He work with us? Satan can come at us from any direction, from 360 degrees; hence we are bound to be overwhelmed. (200:227, February 25, 1990)
Evil activity in the spirit world had been increasing gradually ever since the Human Fall. But the situation changed drastically in the 1980s, when hosts of evil spirits descended to the earth and greatly increased their activities there.
Why did this happen? In former times, when the central figures of the Providence did not know the identity of Satan, the root of sin, or the nature of the Original Sin, Satan felt at ease and could take his time creating his self-centered world. However, when the True Parents came into the world the situation began to change. The True Parents revealed the identity of Satan, the root of sin, and that the Original Sin was fornication. They figured out all Satan’s traits and all his tricks, facts that not even God had revealed to humanity. Then the True Parents began making conditions so that Satan could no longer stand on his feet on the earth. As they achieved victory after victory in the Providence of Restoration, Satan was taken aback; then he began to get nervous. In response, Satan mobilized evil spirits in the spirit world to work with evil spirits in the bodies of people on the earth, by stimulating their resentment and their desire to take revenge on the descendants of the people who had caused them pain.
In particular, Satan watched closely for opportunities to invade Blessed families. Whenever he found any bad conditions, he put evil spirits into them. He wanted to block them from advancing and turn them from a God-centered life. God expected that Blessed families would make unity of heart with God and True Parents by living with absolute faith, absolute love and absolute obedience. Satan cannot invade such families. But when Blessed families acted in unprincipled ways, they made conditions for Satan to invade them. Most of them expected that the victory of True Parents would protect them; they didn’t look deeply at themselves to check whether they had anything for which Satan could accuse them. They didn’t reflect on whether they still had any fallen nature. Therefore, at least from now on, we must work hard to purify ourselves from evil and sin and be reborn as original, true children. (Heung Jin Moon, Message from the Spirit World, January 1, 2001)