I

When people have yet to be saved, their lives are often disturbed, and even controlled, by Satan. In other words, people who have not been saved are prisoners to Satan, they have no freedom, they have not been relinquished by Satan, they're not qualified or entitled to worship God, and they're closely pursued and viciously attacked by Satan. Such people have no happiness to speak of, they have no right to a normal existence to speak of, and much less do they have any dignity to speak of. If you stand up and do battle with Satan, using your faith in God, and submission to God and fear of God as the weapons with which to fight a life-and-death battle with Satan, such that you fully defeat Satan and cause it to turn tail and become cowardly whenever it sees you, only then will it completely abandon its attacks and accusations against you, and at that very moment, you will be saved and become free.

II

If you're just determined to fully break with Satan, but are not equipped with effective weapons to defeat Satan, then you are still in great danger. As time goes on, when you have been so tortured by Satan that there's not an ounce of strength left in you, yet you have still been unable to bear testimony, have still not completely freed yourself from Satan's accusations and attacks against you, then you'll have little hope of salvation. In the end, that is, when the conclusion of God's work is proclaimed, if you are still in the grip of Satan, unable to break free, then you will never have a chance or hope. The implication, then, is that such people will be completely in Satan's captivity.

from The Word, Vol. 2. On Knowing God. God's Work, God's Disposition, and God Himself II