More over, the information of ACIM diverges somewhat from standard Christian teachings, despite its repeated sources to Christian terminology and concepts. The course reinterprets essential facets of Christianity, such as the nature of sin, salvation, and the position of Jesus Christ. As an example, ACIM shows that sin is not true and that salvation is achieved through a modify in notion as opposed to through the atoning compromise of Jesus. This reinterpretation is seen as problematic for those who adhere to orthodox Christian values, as it fundamentally alters the primary tenets of these faith. The divergence from traditional doctrine has led many Religious scholars to dismiss ACIM as heretical or misleading.

The emotional affect of ACIM on their adherents is another section of concern. As the course claims internal peace and spiritual  a course in miracles eckhart tolle enlightenment, some psychological wellness experts have raised alarms about their potential to trigger frustration, disillusionment, and actually emotional harm. The course's increased exposure of the illusory nature of the product world and the vanity may cause people to question the fact of their experiences and thoughts in methods might not be beneficial. For some, that wondering may result in a diminished capacity to manage real-world problems and associations, ultimately causing isolation and a feeling of detachment from life. Experts argue that this kind of method may be particularly dangerous for persons that are currently weak or experiencing emotional wellness issues.

Yet another stage of critique is the possible lack of scientific support for the claims produced by ACIM. The course asserts that its teachings can lead to profound religious change and healing, but these statements are not supported by medical research or clinical studies. Without scientific evidence to back up their assertions, ACIM relies seriously on anecdotal evidence and personal testimonials, which are inherently subjective and unreliable. The lack of demanding, aim study causes it to be hard to establish the real efficiency of the course and improves questions about its over all legitimacy.

The commercial facets of ACIM also invite skepticism. Since its book, the class has spawned a multi-million dollar business that includes publications, workshops, seminars, and online courses. Experts disagree that the commercialization of ACIM undermines their spiritual message and increases honest issues about the motivations of those that promote it. The large prices associated with participating in ACIM-related activities could be high for many, ultimately causing accusations that the program is more focused on gain than on real religious growth. This commercialization is visible as exploiting the spiritual wants and vulnerabilities of people for economic gain.