Among the key themes of ACIM is the idea of forgiveness. The Program shows that forgiveness is not just pardoning some one for his or her wrongdoings, but alternatively, it's the recognition that there surely is nothing to forgive. It asserts that what we understand as wrongdoings are ultimately caused by our personal misperceptions and projections. In forgiving others, we are, actually, forgiving ourselves. ACIM stresses that forgiveness is a road to internal peace and liberation from the burdens of resentment and anger.

Another fundamental principle of A Course in Wonders may be the indisputable fact that the bodily world is definitely an illusion. It posits which our physical activities are unreliable indicators of fact and that true perception can only just be performed through a change in consciousness. The Class distinguishes involving the "real-world," which is really a state of acim​ and oneness beyond the substance region, and the "vanity world," known by fear, divorce, and conflict. According to ACIM, our primary function is always to awaken from the dream of the confidence world and come back to the understanding of our heavenly nature.

ACIM also presents the thought of the Sacred Heart as helpful tips and teacher within the individual. That religious existence sometimes appears as the foundation of creativity and wisdom, helping people produce possibilities that cause us closer to reality and far from illusion. The Class shows that through our willingness to be controlled by the Sacred Spirit's guidance, we could accessibility a deeper knowledge of our purpose and the road to healing.

The Book for Pupils in A Program in Miracles contains 365 instructions, one for every day of the year. These instructions are created to help students internalize the teachings and use them to their daily lives. They frequently include meditative and contemplative exercises, affirmations, and insights on the ideas shown in the text. The goal of these day-to-day lessons would be to change the student's notion and attitude slowly, primary them towards a situation of true forgiveness, internal peace, and religious awakening.