A Program in Miracles, usually abbreviated as ACIM, is really a profound and powerful religious text that appeared in the latter 50% of the 20th century. Comprising over 1,200 pages, this extensive work is not just a guide but a complete course in religious transformation and inner healing. A Program in Miracles is exclusive in its approach to spirituality, drawing from different religious and metaphysical traditions to present a method of believed that aims to lead individuals to a state of inner peace, forgiveness, and awareness to their correct nature.

The beginnings of A Program in Wonders could be traced back again to the venture between two individuals, Helen Schucman and Bill Thetford, both of whom were distinguished psychologists and researchers. The course's inception occurred in the early 1960s when Schucman, who was simply a clinical and study psychiatrist at Columbia University's College of Physicians and Surgeons,  the mystical teachings of Jesus to see some inner dictations. She defined these dictations as originating from an inner style that determined it self as Jesus Christ. Schucman initially resisted these activities, but with Thetford's inspiration, she began transcribing the communications she received.

Around a period of seven decades, Schucman transcribed what would become A Course in Wonders, amounting to three volumes: the Text, the Workbook for Pupils, and the Handbook for Teachers. The Text lies out the theoretical base of the class, elaborating on the key ideas and principles. The Workbook for Students contains 365 classes, one for every time of the season, designed to guide the reader through a daily practice of applying the course's teachings. The Manual for Teachers offers further advice on the best way to realize and show the axioms of A Class in Miracles to others.

Among the main subjects of A Class in Miracles is the thought of forgiveness. The course teaches that true forgiveness is the important thing to internal peace and awakening to one's heavenly nature. According to their teachings, forgiveness is not only a ethical or moral practice but a simple shift in perception. It requires letting move of judgments, grievances, and the belief of failure, and as an alternative, viewing the world and oneself through the contact of love and acceptance. A Course in Wonders emphasizes that true forgiveness contributes to the recognition that individuals are interconnected and that separation from one another is definitely an illusion.