One of the main themes of ACIM is the concept of forgiveness. The Program shows that forgiveness is not merely pardoning someone due to their wrongdoings, but rather, it's the recognition that there is nothing to forgive. It asserts that what we perceive as wrongdoings are fundamentally caused by our personal misperceptions and projections. In forgiving others, we are, in reality, flexible ourselves. ACIM emphasizes that forgiveness is really a path to inner peace and liberation from the burdens of resentment and anger.

Still another elementary principle of A Program in Wonders is the idea that the physical earth is an illusion. It posits that our physical experiences are unreliable signals of truth and that true perception can just only be performed through a change in a course in miracles text . The Class distinguishes involving the "real life," which is a state of peace and oneness beyond the product world, and the "confidence earth," indicated by concern, divorce, and conflict. In accordance with ACIM, our major purpose would be to wake from the dream of the confidence earth and return to the consciousness of our heavenly nature.

ACIM also presents the idea of the Sacred Nature as helpful information and instructor within the individual. That spiritual presence is observed as the origin of creativity and knowledge, supporting people make choices that lead us nearer to truth and far from illusion. The Program teaches that through our willingness to listen to the Holy Spirit's advice, we can entry a greater understanding of our function and the path to healing.

The Workbook for Pupils in A Program in Wonders contains 365 lessons, one for each day of the year. These lessons are designed to support students internalize the teachings and use them to their day-to-day lives. They often contain meditative and contemplative exercises, affirmations, and insights on the concepts presented in the text. The goal of these daily classes is always to shift the student's understanding and mindset slowly, primary them towards a situation of correct forgiveness, internal peace, and religious awakening.