Sanctification is correctly viewed as justification applied. Our position in Christ, as I have shown above, provides protection for a believer from demon possession in the first place. Our position in Christ is the basis for living the Christian life, which includes help in the area of resisting the temptations of the world, the flesh, and the Devil. Any idea that we as sinful creatures must forgive our sinless God is blasphemous. God has never done anything wrong to ever be in need of forgiveness.
Forgiveness is what is offered to one who has wronged another.
So it is clear from the context that Christ is talking freedom from sin, not about freedom from demons. Christ did not carry on a discussion about the truth with the demons He cast out, using His power as God. Christ demanded them to leave because He was powerful enough to bind the strongman. Once again, Anderson's error is his belief that Christians can be demonized, when in reality they cannot. Power encounters for casting out demons are also wrong because Christians cannot be demon possessed.