Introduction to Forgiveness.
It begins by saying that forgiveness gives wings to prayer so that its ascent is easy and its progress swift. This isn't the case. If you want to give the phrase some meaning, you could say: Belief in prayer gives it wings.
Your brother in the plan of salvation, that's true. Everything else is meaningless and confuses you; (in truth, they were the ones who were confused).
Then it says: Behold the greatest help that God commanded to be with you until you reach Him. And with that comes the end of illusions. All this is the Atonement, which is Jesus' forgiveness of your illusions.
Then it says the next title: Forgiving Yourself.
What forgiveness is the introduction talking about? And this last title is talking about forgiving myself, therefore the introduction to the topic is incoherent. I believe it if Jesus is incoherent; if there's one thing you can be sure of, it's that Jesus is completely consistent.
If you wish, you can refer to the section; correcting ACIM in the videos. It is video number 4.