One of many key styles of ACIM is the concept of forgiveness. The Class teaches that forgiveness isn't simply pardoning some one because of their wrongdoings, but rather, it's the recognition that there's nothing to forgive. It asserts that what we understand as wrongdoings are ultimately the result of our personal misperceptions and projections. In forgiving the others, we are, in fact, flexible ourselves. ACIM highlights that forgiveness is a road to inner peace and liberation from the burdens of resentment and anger.

Still another fundamental concept of A Course in Miracles could be the idea that the bodily earth is an illusion. It posits that our sensory experiences are unreliable signs of truth and that correct belief can only just be performed through a shift in consciousness. The Course distinguishes between the "real world," which really is a state of peace and oneness beyond the product sphere, and the "pride world," indicated by concern, divorce, and conflict. In accordance with ACIM, our primary function would be to awaken from the desire of the pride earth and return to the consciousness of our divine nature.

ACIM also presents the idea of the Holy Spirit as a guide and teacher within the individual. This spiritual existence is observed as the foundation of a course in miracles  motivation and wisdom, helping us make choices that lead us closer to truth and away from illusion. The Course teaches that through our willingness to hear the Sacred Spirit's advice, we can accessibility a deeper knowledge of our purpose and the path to healing.

The Workbook for Pupils in A Class in Wonders includes 365 instructions, one for every single day of the year. These classes are created to help students internalize the teachings and use them with their everyday lives. They often contain meditative and contemplative workouts, affirmations, and reflections on the methods presented in the text. The purpose of these daily classes is to change the student's perception and mindset gradually, leading them towards circumstances of correct forgiveness, inner peace, and spiritual awakening.