The sources of A Class in Miracles could be tracked back to the relationship between two people, Helen Schucman and William Thetford, equally of whom were outstanding psychologists and researchers. The course's inception occurred in early 1960s when Schucman, who was a scientific and study psychiatrist at Columbia University's College of Physicians and Surgeons, started to have some internal dictations. She explained these dictations as coming from an interior voice that discovered itself as Jesus Christ. Schucman originally resisted these activities, but with Thetford's support, she started transcribing the messages she received.

Over an amount of seven years, Schucman transcribed what can become A Class in Wonders, amounting to three quantities: the Text, the Book for Pupils, and the Information for Teachers. The Text lays out the theoretical basis of the program, elaborating on the core ideas and principles. The a course in miracles for Students includes 365 instructions, one for every time of the year, developed to steer the reader by way of a day-to-day exercise of using the course's teachings. The Handbook for Teachers offers more guidance on how to realize and train the maxims of A Program in Wonders to others.

One of the main themes of A Program in Wonders is the idea of forgiveness. The class shows that true forgiveness is the main element to internal peace and awareness to one's heavenly nature. According to its teachings, forgiveness is not only a moral or moral exercise but a simple change in perception. It involves allowing go of judgments, grievances, and the understanding of sin, and alternatively, seeing the entire world and oneself through the contact of love and acceptance. A Course in Miracles highlights that correct forgiveness leads to the acceptance that people are typical interconnected and that separation from one another is an illusion.

Still another significant part of A Class in Miracles is their metaphysical foundation. The class presents a dualistic view of reality, distinguishing involving the ego, which shows divorce, fear, and illusions, and the Holy Spirit, which symbolizes love, truth, and religious guidance. It implies that the ego is the source of suffering and struggle, as the Holy Heart provides a pathway to therapeutic and awakening. The goal of the course is to simply help individuals surpass the ego's restricted perspective and arrange with the Holy Spirit's guidance.