From the mental perspective, the origins of ACIM increase questions about their validity. Helen Schucman, the primary scribe of the text, stated that the words were dictated to her by an internal voice she identified as Jesus. This process of receiving the writing through internal dictation, referred to as channeling, is usually met with skepticism. Experts disagree that channeling could be recognized as a emotional phenomenon rather than a real religious revelation. Schucman himself was a medical psychologist, and some declare that the style she seen has been a manifestation of her unconscious mind rather than an additional divine entity. Also, Schucman indicated ambivalence about the task and its beginnings, sometimes asking its reliability herself. This ambivalence, coupled with the strategy 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 a philosophical angle. The class shows that the planet we comprehend with our feelings is definitely an illusion and which our true truth lies beyond this bodily realm. This idealistic see, which echoes certain Eastern philosophies, challenges the materialistic and empirical foundations of American thought. Authorities  david hoffmeister that the claim that the bodily world can be an impression is not substantiated by scientific evidence and runs table to the medical technique, which depends on observable and measurable phenomena. The idea of an illusory earth may be convincing as a metaphor for the distortions of belief caused by the pride, but as a literal assertion, it lacks the empirical support required to be described as a valid illustration of reality.

Moreover, the practical request of ACIM's teachings can be problematic. The program advocates for a significant form of forgiveness, indicating that all issues are illusions and should be ignored in support of recognizing the natural unity of all beings. As the exercise of forgiveness may indeed be healing and transformative, ACIM's method may lead people to suppress legitimate emotions and ignore actual injustices. By framing all negative activities as illusions developed by the confidence, there's a danger of minimizing or invalidating the existed activities of putting up with and trauma. That perspective may be particularly harmful for individuals coping with critical problems such as for example abuse or oppression, as it might discourage them from seeking the required support and interventions.

Still another position of rivalry is the way in which ACIM has been marketed and commercialized. Because its publication, ACIM has spawned an important industry of workshops, seminars, and supplementary materials. Experts disagree that this commercialization undermines the spiritual reliability of the teachings, turning what is purported to be a sacred text right into a profit-driven enterprise. The expansion of ACIM-related items and solutions has led some to question the motivations behind their campaign and the authenticity of those that claim to show its principles. This industrial part can create a buffer to genuine religious exploration, as individuals may become more dedicated to getting the next guide or joining the next class as opposed to participating profoundly with the teachings themselves.