The sources of A Class in Wonders can be followed back to the effort between two persons, Helen Schucman and William Thetford, equally of whom were outstanding psychologists and researchers. The course's inception occurred in the early 1960s when Schucman, who had been a clinical and research psychologist at Columbia University's College of Physicians and Surgeons, started to see some internal dictations. She explained these dictations as originating from an internal voice that discovered itself as Jesus Christ. Schucman originally resisted these activities, but with Thetford's encouragement, she started transcribing the messages she received.

Around an amount of eight years, Schucman transcribed what would become A Course in Wonders, amounting to three sizes: the Text, the Workbook for Pupils christian mysticism churches and the Manual for Teachers. The Text lays out the theoretical basis of the course, elaborating on the key concepts and principles. The Workbook for Pupils includes 365 instructions, one for every day of the entire year, designed to guide the reader through a day-to-day practice of using the course's teachings. The Information for Teachers provides further advice on the best way to understand and train the rules of A Course in Wonders to others.

One of the main subjects of A Course in Wonders is the idea of forgiveness. The class teaches that true forgiveness is the key to inner peace and awakening to one's heavenly nature. According to its teachings, forgiveness is not only a ethical or honest exercise but a fundamental change in perception. It involves making get of judgments, grievances, and the perception of sin, and alternatively, viewing the planet and oneself through the lens of enjoy and acceptance. A Class in Wonders emphasizes that correct forgiveness results in the recognition that people are all interconnected and that divorce from each other is an illusion.

Yet another significant facet of A Course in Wonders is its metaphysical foundation. The course gifts a dualistic view of reality, distinguishing between the pride, which represents divorce, concern, and illusions, and the Sacred Soul, which symbolizes enjoy, truth, and spiritual guidance. It shows that the ego is the source of putting up with and conflict, while the Holy Soul offers a pathway to healing and awakening. The target of the program is to help persons surpass the ego's restricted perception and arrange with the Sacred Spirit's guidance.