1) An illusory world
2) Your belief that the illusory world is reality.
You are meant to correct your misperception of the ILLUSORY world, by undoing your belief that it is REAL.
That's what it means when the Course says "seek not to change the world, but seek to change your mind about the world."
It does not mean, change your mind about a REAL world. It means, your idea that the world even IS real, IS your misperception of the illusion, and that in TRUTH, this world is ONLY an illusion, not a reality.
Seeking to change your mind about the world, to fix your perceptual errors, should NOT lead to a state where you are still seeing the world as "real" but with some kind of "peace" happening.
If you deeply and fully have removed the insanity from your mind, have undone your perceptual errors, and are no longer mistaken, you MUST be in a state of mind that recognizes the world is NOT REAL. You MUST be seeing that it is in fact an illusion, through and through.
Many people are very deluded in their comprehension of what the Course means by this, and therefore develop this attitude that the world is objectively real and you should therefore just change how you look at it. That you should "look at the real world from a peaceful perspective".
That leads to tremendous POWERLESSNESS, whereby you think that you only need to fix your misperception of a REAL world, so that you will see a REAL world correctly. NO!
THE WORLD IS NOT REAL!!!!!!!!!!!
If you do that, and your goal is to see this "real world" in a perfect way, you will HAVE to at some point become stuck. At some point, your belief in its "reality" is going to put a ceiling on how much awakening you can have, because if you were to go further, you would have to question whether the world is real or not. And since you believe IT IS real, that means you can ONLY fix your interpretations of stuff happening outside your control, and basically will WELCOME DEATH with open arms as though - you know... it's a part of life, meant to happen, inevitable, etc. Then you will "die in peace". COME ON!!!!
The world is an illusion. All sin is an illusion. All death is an illusion. All bodies are illusions. The entire world AND the entire universe is an illusion! This is not REALITY that you're in. It's a delusional hallucination. At most it is an illusion, but you've been trying to make more of it... to "make it real". If forgiveness is the undoing of "making the problem real", then that should tell you, that forgiveness leads to the awareness that IT IS NOT REAL.
The only way you can claim the atonement for yourself or anyone, is if you are prepared to be aware that this entire world is an ILLUSION. You must be willing to accept this or you CANNOT wake up from it.
If the world is real, you cannot be innocent, you cannot be sinless, you cannot be guiltless, and you cannot be free from fear. AND, you cannot be forgiven. The only way you are innocent, and the only way you can claim the atonement, is if this is all just an illusion. Reality is elsewhere! This is just a dream.