Among the main styles of ACIM is the thought of forgiveness. The Program shows that forgiveness is not only pardoning some body for his or her wrongdoings, but rather, it's the recognition that there's nothing to forgive. It asserts that what we perceive as wrongdoings are finally the consequence of our personal misperceptions and projections. In flexible the others, we are, actually, forgiving ourselves. ACIM highlights that forgiveness is a way to inner peace and liberation from the burdens of resentment and anger.

Yet another essential theory of A Program in Wonders may be the proven fact that the physical world is definitely an illusion. It posits that our physical activities are unreliable indicators of truth and that correct belief can just only be achieved via a shift in consciousness. The Program distinguishes involving the "real-world," which is really a state of peace and acim​ beyond the product realm, and the "pride earth," known by concern, divorce, and conflict. According to ACIM, our main purpose is to awaken from the desire of the confidence earth and come back to the consciousness of our divine nature.

ACIM also introduces the thought of the Holy Soul as a guide and instructor within the individual. That religious existence is observed as the source of inspiration and knowledge, helping people produce possibilities that cause us closer to reality and away from illusion. The Program teaches that through our willingness to listen to the Holy Spirit's guidance, we are able to access a further comprehension of our function and the road to healing.

The Book for Students in A Program in Wonders includes 365 lessons, one for every single day of the year. These instructions are made to help pupils internalize the teachings and use them with their daily lives. They often contain meditative and contemplative exercises, affirmations, and insights on the methods shown in the text. The objective of these day-to-day lessons is always to shift the student's perception and attitude steadily, primary them towards circumstances of correct forgiveness, inner peace, and religious awakening.