Quote from A Course in Miracles Text Chapter 26 - THE TRANSITION.

T-26.VII.7. Sin is not error, for it goes beyond correction to impossibility. 2 Yet the belief that it is real has made some errors seem forever past the hope of healing, and the lasting grounds for hell. 3 If this were so, would Heaven be opposed by its own opposite, as real as it. 4 Then would God's Will be split in two, and all creation be subjected to the laws of two opposing powers, until God becomes impatient, splits the world apart, and relegates attack unto Himself. 5 Thus has He lost His Mind, proclaiming sin has taken His reality from Him and brought His Love at last to vengeance's heels. 6 For such an insane picture an insane defense can be expected, but can not establish that the picture must be true.