Empirically, there is little to no clinical evidence promoting the metaphysical statements produced by ACIM. The indisputable fact that the bodily earth is an dream created by our collective pride lacks empirical support and runs table to the vast body of scientific information gathered through generations of remark and experimentation. While subjective activities of transcendence and religious awareness are well-documented, they cannot give target evidence of the non-dualistic truth that ACIM describes. More over, the course's assertion that changing one's thoughts may transform fact in a literal sense is similar to the New Believed movement and the more recent law of attraction, both of that have been criticized for lacking scientific validity. The placebo influence and the power of positive thinking are well-documented phenomena, but they cannot help the fantastic metaphysical claims created by ACIM.

More over, the origins of ACIM raise extra issues about its credibility. Helen Schucman, the psychologist who transcribed the program, described her knowledge as obtaining dictation from an internal style she recognized as Jesus. This method of channeled publishing is not special to ACIM and can be found in various other a course in miracles podcast religious and religious texts throughout history. The subjective nature of those activities helps it be hard to validate their authenticity. Critics disagree that such texts are much more likely products of the subconscious mind as opposed to communications from a heavenly source. Schucman himself had a complicated relationship with the product, allegedly experiencing significant internal conflict about its material and their sources, which gives another coating of ambiguity to the course's states of heavenly authorship.

In addition, the language and design of ACIM in many cases are clever and abstract, making it difficult for several viewers to know and use their teachings. The class is written in a highly stylized form of English, with dense, graceful prose that may be complicated to interpret. That complexity may lead to a wide range of understandings, some of that might diverge somewhat from the intended message. The ambiguity of the writing makes for subjective numbers, which can result in misconceptions and misapplications of its principles. This not enough understanding can undermine the course's performance as a practical information for spiritual development and self-improvement.

Furthermore, the industrial facet of ACIM cannot be overlooked. Since its book, ACIM has spawned a profitable industry of publications, workshops, seminars, and study groups. While economic accomplishment doesn't inherently eliminate the worth of a religious training, it will increase concerns in regards to the potential for exploitation. The commercialization of spiritual teachings can sometimes lead to the prioritization of gain over authentic religious growth, with individuals and companies capitalizing on the course's acceptance to market services and products and services. This dynamic may deter from the sincerity and strength of the teachings, throwing doubt on the motives behind their dissemination.