The secret of salvation tells us that we are doing everything to ourselves, but this is often used only to try to "re-frame" the stuff we thought other people were doing to us. If we open it up, there's a bigger picture here.
It's really actually about our RELATIONSHIP with God and with ourselves and our brothers.
We need to first be clear God is always loving. He does not attack, hurt, damage, threaten, reject, abandon, inflict pain and sickness and death, make anyone afraid, nor does he produce any form of unhappiness. He is continually constantly perfect and holy and innocent and pure and kind.
With that in mind, look then at what you are experiencing in your RELATIONSHIP with God. It is easy in ego to believe that God has abandoned you, God is a dangerous threat, God is out to kill you, God wants revenge etc, because the ego has misinterpreted God and tried to turn him into an evil monster.
The reason for that is that if you can make out that God is the one who DID SIN, and who is responsible for making hell, then you can disown it and hide the fact that He absolutely DID NOT do that. He becomes a convenient scapegoat and decoy to disguise your own sinfulness.
So if we recognize what God really is like, and realize He cannot possibly be the one making our lives hell, upsetting us, making us suffer, etc.... then it must be us. And this is a turning point because now you start to own up to the fact that YOU are the one making your life a living hell.
It's really you that tried to abandon and reject God. It's you that tried to sin against Him. It's you that left Heaven. It's you that threw away everything He gave you. It's you that turned away and sought something more. It's you that is actively pushing Him away. Jesus also says "You attack the real world every second of every day."
Indeed we made an entire world as an attack on God. This world was made as a defense AGAINST God, to shut him out and thus sever our relationship with Him. To hide in form and bodies trying to disguise who and what we are, so that He isn't part of our lives any more. Like holding a major grudge, we wanted nothing to do with Him. We wanted him dead.
It wasn't God that did this. God didn't make an attack planet. He does not attack us WITH the planet or WITH bodies or through sickness and suffering. He is not responsible for wars and murders and all manner of vile things. It's not even remotely His doing at all. God CANNOT do these things, He is utterly incapable of sin, and would never EVER attack you. You are part of Him, and He would be insane if He were to attack Himself.
So you then realize, as clearly as possible, that YOU are the one who has "done this to yourself". You have been hiding from God, rejecting God, abandoning God, attacking God, resisting God, not wanting God, fearing God, trying to make God sick and dead, speaking against God, and trying to live without God. That's your doing, not His, and it's not His will for you.
When you can own that, you can also then decide to choose again. And this is the major theme in the course. You can make a different decision and always be free and capable of returning to a loving relationship with God, in which you share everything and are fully open to Him being in you and with you. God wants that, because from His perspective, He has done nothing but continually love you. And it's just you who has been bearing completely unfounded grudges against Him.
This is why in a sense you need to "forgive God" of what you think He is responsible for, or what you think He "did" (sin), recognizing that He DID NOT do that, and HE is still innocent. But you have to go even further to then also forgive yourself. It's not enough JUST to recognize that God isn't the guilty party. You MUST also undo your own guilt and belief in real sin, that "you really did it, not God."
God knows you have not actually really done anything sinful at all. You have never attacked Him, hurt Him, damaged Him, upset Him, threatened Him, made Him sick or dead, or indeed affected or changed Him even in the tiniest of ways. And the whole authority problem was your attempt to believe you could, or had. Yet you cannot change God, period. Ever. And He still loves you. For-ever.
So His INVITATION, through the Holy Spirit, the "call to return", is merely asking you to come to your senses and accept the truth instead of what you THINK you did to God. Recognize how HE sees you. Recognize and reclaim your innocence. Laugh at the idea that you could ever sin. And thus return to relating TO Him from the same love that He relates to you.
This is what the journey Home is all about. Repairing your sense of a broken relationship with God, and thus with your Self, and with your Divine Brothers. Developing TRUST in Him again, as someone you can have a meaningful and SAFE relationship with. Opening up to re-discovering what He is really LIKE. Opening yourself to RECEIVE every gift that you temporarily shelved, including miracles.
It's a relief to really recognize that the only thing coming between you and God, between you and total happiness and peace and love, is the "hurt relationship" stuff BETWEEN you, that YOU put in place, and YOU can undo. Really, even if you ignore having to deal with other people, or with the body, or the world, the SOLE (soul) issue is your connection with God. First and foremost. And if you seek first the Kingdom of God, the way is made straight. All other relationships will fall into place when you get yourself "right with God."
Love God again. Job done.