You are not trapped in the world you see, because its cause can be changed. This change requires, first, that the cause be identified and then [second] let go, so that [third] it can be replaced. The first two steps in this process require your cooperation. The final one does not(A Course in Miracles Workbook, W-p1.23.5:1-4).
Bruce Rawles leads us through the three basic steps of Forgiveness as outlined in A Course in Miracles. He refers us to Forgiveness and Jesus: The Meeting Place of A Course in Miracles and Christianity, pp. 59-66, Fifth Edition, By Kenneth Wapnick, Ph.D.,
There is a prayer the Course urges us to use whenever we are not joyous, and it contains within it the three steps we are describing:
I must have decided wrongly, because I am not at peace.
I made the decision myself, but I can also decide otherwise.
I want to decide otherwise, because I want to be at peace.
I do not feel guilty, because the Holy Spirit will undo all the
consequences of my wrong decision if I will let Him.
I choose to let Him, by allowing Him to decide for God for me.