One of the central styles of ACIM is the thought of forgiveness. The Program teaches that forgiveness isn't only pardoning some body due to their wrongdoings, but instead, it's the acceptance that there's nothing to forgive. It asserts that what we perceive as wrongdoings are eventually caused by our personal misperceptions and projections. In forgiving the others, we're, in reality, flexible ourselves. ACIM emphasizes that forgiveness is just a road to internal peace and liberation from the burdens of resentment and anger.

Yet another simple principle of A Program in Wonders may be the idea that the bodily world is an illusion. It posits our sensory activities are unreliable indications of reality and that correct perception can just only be who is Jesus Christ achieved through a change in consciousness. The Course distinguishes between the "real-world," which really is a state of peace and oneness beyond the material kingdom, and the "ego earth," characterized by anxiety, divorce, and conflict. Based on ACIM, our principal function is to awaken from the desire of the confidence earth and go back to the consciousness of our divine nature.

ACIM also introduces the thought of the Holy Nature as a guide and instructor within the individual. That spiritual presence is seen as the foundation of motivation and knowledge, helping us make possibilities that cause people nearer to reality and far from illusion. The Class teaches that through our readiness to hear the Holy Spirit's guidance, we can access a greater understanding of our function and the road to healing.

The Book for Students in A Program in Miracles includes 365 lessons, one for every single time of the year. These instructions are designed to help pupils internalize the teachings and use them to their day-to-day lives. They often include meditative and contemplative workouts, affirmations, and insights on the concepts shown in the text. The purpose of these daily lessons would be to shift the student's understanding and mind-set gradually, primary them towards a state of true forgiveness, internal peace, and spiritual awakening.