Another simple concept of A Program in Miracles may be the idea that the physical world is an illusion. It posits that our physical experiences are unreliable indications of reality and that true understanding can just only be achieved via a shift in consciousness. The Course distinguishes involving the "real world," which is really a state of peace and oneness beyond the material realm, and the "confidence world," known by anxiety, separation, and conflict. Based on ACIM, our major function is always to wake from the desire of the ego earth and return to the attention of our heavenly nature.

ACIM also introduces the notion of the Holy Nature as helpful information and teacher within the individual. That religious presence is seen as the source of inspiration and wisdom, supporting acim us make choices that cause us nearer to reality and away from illusion. The Program teaches that through our willingness to be controlled by the Sacred Spirit's advice, we can access a deeper understanding of our function and the way to healing.

The Book for Students in A Class in Wonders consists of 365 lessons, one for each day of the year. These instructions are designed to support students internalize the teachings and apply them to their daily lives. They frequently contain meditative and contemplative workouts, affirmations, and insights on the concepts shown in the text. The goal of these everyday instructions is always to shift the student's perception and mindset gradually, primary them towards a state of true forgiveness, inner peace, and religious awakening.

The Manual for Teachers, the third component of ACIM, is aimed at those who have embraced the concepts of the Class and feel required to fairly share them with others. It provides guidance on the characteristics of a real teacher of God, emphasizing qualities such as patience, trust, and an start heart. It acknowledges the difficulties and limitations one might experience while teaching the Class and presents insights on the best way to understand them.