"A Course in Miracles (often called just 'the Course') is a self-study course for retraining the mind that is spiritual, rather than religious, in its perspective..."
This section also seems to be quite different from the more edited ACIM, if my senses are correct.
This introduction section of chapter 2 is quite different from the more edited version of ACIM.
This first section of the first chapter in the original edition of ACIM contains within it the first six sections of the first chapter within the edited version of ACIM, which is the more standard, popular, and well-known edtion. And as some of you might notice, there are quite a few word differences here and there and some sentences left out entirely from the latter aforementioned edition.