ACIM says of healing: "Forgiveness is not real unless it brings a healing to your brother and yourself. You must attest his sins have no effect on you to demonstrate they are not real. How else could he be guiltless? And how could his innocence be justified unless his sins have no effect to warrant guilt? Sins are beyond forgiveness just because they would entail effects that cannot be undone and overlooked entirely. In their undoing lies the proof that they are merely errors. Let yourself be healed that you may be forgiving, offering salvation to your brother and yourself."
What this is saying is that when you fully believe the truth, that you are not a victim, that forgiveness has been performed, and that atonement has been claimed, there MUST be a DEMONSTRATION OF HEALING, in both yourself and your brother, to SHOW that what seemed to happen in sin has had NO REAL EFFECT.
This correlates with a part in the bible which says that signs must follow those who believe, meaning, supernatural manifestations of truth must be exhibited as proof that what you believe is true. Not just a belief intellectually, but a DEMONSTRATION.
"You must attest his sins have no effect on you to demonstrate they are not real."
If your brother does something to you and it has an effect on you, this proves his guilt. Jesus is asking us to prove his innocence, by not allowing such effects to be shown.
And just think about this:
"Forgiveness is not real unless it brings a healing to your brother and yourself."