From a mental perspective, the sources of ACIM raise issues about its validity. Helen Schucman, the primary scribe of the writing, claimed that the language were dictated to her by an internal voice she recognized as Jesus. This process of obtaining the writing through internal dictation, called channeling, is frequently met with skepticism. Authorities disagree that channeling can be recognized as a psychological trend rather than real spiritual revelation. Schucman himself was a clinical psychologist, and some claim that the voice she seen could have been a manifestation of her unconscious mind rather than an additional heavenly entity. Also, Schucman indicated ambivalence about the job and their beginnings, sometimes asking its credibility herself. This ambivalence, along with the technique of the text's reception, casts doubt on the legitimacy of ACIM as a divinely inspired scripture.

The content of ACIM also attracts scrutiny from the philosophical angle. The program teaches that the planet we see with your feelings can be an illusion and our correct reality lies beyond this physical realm. This idealistic view, which a course in miracles echoes specific Eastern philosophies, problems the materialistic and empirical foundations of American thought. Experts fight that the claim that the physical world can be an illusion isn't substantiated by empirical evidence and works counter to the medical technique, which utilizes visible and measurable phenomena. The notion of an illusory world may be persuasive as a metaphor for the distortions of notion brought on by the confidence, but as a literal assertion, it lacks the empirical support necessary to be considered a valid illustration of reality.

More over, the sensible software of ACIM's teachings could be problematic. The course advocates for a significant type of forgiveness, indicating that issues are illusions and ought to be neglected in support of recognizing the natural unity of most beings. As the exercise of forgiveness can indeed be therapeutic and major, ACIM's method might lead people to restrain respectable feelings and ignore actual injustices. By framing all negative activities as illusions created by the ego, there is a risk of minimizing or invalidating the lived activities of suffering and trauma. That perspective can be especially dangerous for persons working with serious problems such as abuse or oppression, as it might suppress them from seeking the required support and interventions.

Still another point of rivalry is just how ACIM has been advertised and commercialized. Since their book, ACIM has spawned a significant market of workshops, seminars, and supplementary materials. Authorities disagree that commercialization undermines the spiritual integrity of the teachings, turning what is proposed to be always a holy text right into a profit-driven enterprise. The proliferation of ACIM-related products and services has light emitting diode some to issue the motivations behind its campaign and the credibility of people who maintain to teach their principles. This professional element can cause a buffer to genuine spiritual exploration, as people may be much more focused on getting another book or attending another class as opposed to participating deeply with the teachings themselves.