The emotional affect of ACIM on its adherents is another section of concern. While the program promises inner peace and spiritual enlightenment, some emotional health professionals have raised alerts about its potential to trigger confusion, disillusionment, and actually mental harm. The course's focus on the illusory character of the material world and the ego may lead people to question the truth of the experiences and thoughts in methods that might not be beneficial. For many, this wondering may result in a reduced volume to deal with real-world problems and relationships, leading to isolation and a feeling of detachment from life. Critics disagree that this kind of strategy may be particularly harmful for people who are already prone to or fighting mental wellness issues.

Still another point of criticism is the possible lack of scientific help for the states made by ACIM. The class asserts that its teachings may lead to profound religious transformation and healing, but these states aren't reinforced by clinical study or scientific studies. Without scientific evidence to back a course in miracles  up their assertions, ACIM relies seriously on historical evidence and personal testimonies, which are inherently subjective and unreliable. The possible lack of arduous, goal research helps it be difficult to ascertain the true efficiency of the course and increases questions about their overall legitimacy.

The professional facets of ACIM also invite skepticism. Because their publication, the program has spawned a multi-million dollar business that includes publications, workshops, seminars, and online courses. Experts disagree that the commercialization of ACIM undermines its religious information and increases ethical concerns in regards to the motivations of people who promote it. The large costs associated with participating in ACIM-related actions could be high for all, leading to accusations that the class is more focused on profit than on authentic spiritual growth. That commercialization is visible as exploiting the religious wants and vulnerabilities of people for economic gain.

Furthermore, the language and structure of ACIM in many cases are criticized for being very complicated and esoteric. The course's dense and repeated prose can be complicated to know and interpret, resulting in distress and misinterpretation among readers. That complexity can create a buffer to access, rendering it problematic for persons to fully interact with and benefit from the course. Some authorities fight that the complicated language is really a purposeful strategy to unknown the lack of substantive material and to generate a dream of depth. The issue in understanding the substance can also lead to a dependence on external educators and interpreters, further perpetuating the commercialization and possibility of exploitation within the ACIM community.