I don't know who first coined that phrase. I believe I first heard it while reading at either the DU discussion group or Course Talk.
But, man oh man, if you're a Course student, there's no getting away from it. I don't see any way to actually correct someone else. First of all, according to Jesus, there is no one else. So, the minute I walk up to someone, or call them up, or whip out my keyboard to straighten out one of my brothers or sisters, what am I really doing but making the separation real in my own mind.
Now, if someone is standing on my toe, I'll speak up. There's no need to be weird!
But if someone thinks I'm a poor student who doesn't forgive right or whatever, what does that really say about me? In truth, it says nothing about me. What it really says is that the person making the judgments secretly believes they are guilty otherwise they wouldn't need to make the judgments. And if one of my brothers is surrounded by imaginary guilt, the last thing I want to do is reinforce it.
So knowing that much makes it so much easier to just stop and join with Jesus in my mind and forgive "both" of us for what we haven't really done. And if I can keep that up, I will become whole again! Thank God!