Furthermore, the content of ACIM diverges somewhat from old-fashioned Religious teachings, despite its regular references to Religious terminology and concepts. The program reinterprets key facets of Christianity, including the nature of sin, salvation, and the position of Jesus Christ. As an example, ACIM teaches that sin isn't actual and that salvation is reached via a change in understanding as opposed to through the atoning sacrifice of Jesus. This reinterpretation is seen as problematic for many who stick to orthodox Christian values, because it fundamentally alters the primary tenets of their faith. The divergence from standard doctrine has led many Christian scholars to dismiss ACIM as heretical or misleading.

The psychological affect of ACIM on their adherents is yet another area of concern. As the class claims inner peace and religious enlightenment, some mental wellness specialists have raised alerts about their possible to trigger confusion, a course in miracles disillusionment, and even emotional harm. The course's focus on the illusory character of the product world and the ego can cause people to problem the fact of the experiences and thoughts in ways that may possibly not be beneficial. For many, this questioning may result in a diminished capacity to manage real-world problems and associations, resulting in solitude and a feeling of detachment from life. Experts fight that this method could be specially dangerous for people who are currently weak or experiencing mental health issues.

Still another stage of critique is the possible lack of empirical help for the claims created by ACIM. The class asserts that its teachings can result in profound spiritual change and therapeutic, but these statements are not supported by scientific study or medical studies. Without empirical evidence to straight back up its assertions, ACIM relies greatly on historical evidence and particular testimonials, which are inherently subjective and unreliable. The lack of rigorous, purpose study causes it to be hard to ascertain the actual effectiveness of the program and improves issues about its over all legitimacy.

The professional aspects of ACIM also ask skepticism. Because its publication, the course has spawned a multi-million money business which includes publications, workshops, seminars, and on the web courses. Authorities fight that the commercialization of ACIM undermines its spiritual message and improves moral concerns about the motivations of people who promote it. The large prices associated with participating in ACIM-related actions can be high for most, ultimately causing accusations that the course is more centered on income than on authentic religious growth. That commercialization can be seen as exploiting the spiritual needs and vulnerabilities of individuals for economic gain.