The beginnings of A Class in Wonders can be traced back again to the relationship between two individuals, Helen Schucman and William Thetford, both of whom were outstanding psychologists and researchers. The course's inception happened in early 1960s when Schucman, who was a scientific and study psychologist at Columbia University's College of Physicians and Surgeons, started to experience a series of inner dictations. She explained these dictations as via an internal style that identified itself as Jesus Christ. Schucman originally resisted these activities, but with Thetford's support, she began transcribing the communications she received.

Around a period of eight decades, Schucman transcribed what can become A Class in Miracles, 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 concepts and  the mystical teachings of Jesus. The Book for Students contains 365 lessons, one for every single time of the season, designed to guide the reader by way of a day-to-day practice of applying the course's teachings. The Handbook for Teachers gives more advice on how best to realize and show the principles of A Program in Wonders to others.

Among the key themes of A Class in Miracles is the idea of forgiveness. The course shows that true forgiveness is the important thing to inner peace and awareness to one's heavenly nature. In accordance with their teachings, forgiveness is not merely a ethical or honest exercise but a simple change in perception. It involves letting go of judgments, issues, and the understanding of failure, and as an alternative, viewing the world and oneself through the lens of love and acceptance. A Course in Wonders highlights that correct forgiveness leads to the acceptance that we are all interconnected and that divorce from each other can be an illusion.

Still another significant part of A Class in Miracles is its metaphysical foundation. The course presents a dualistic view of truth, unique involving the ego, which shows separation, anxiety, and illusions, and the Sacred Nature, which symbolizes love, truth, and spiritual guidance. It shows that the vanity is the origin of putting up with and conflict, whilst the Holy Soul supplies a pathway to therapeutic and awakening. The goal of the class is to simply help individuals transcend the ego's restricted perspective and align with the Holy Spirit's guidance.