A Course in Miracles is a spiritual self-study program designed to bring about a shift in perception through the practice of forgiveness and inner peace. The course, authored by Helen Schucman and Bill Thetford, presents a unique approach to spirituality that combines metaphysical teachings with practical applications. It emphasizes the power of love and the importance of letting go of fear and judgment, aiming to help individuals experience a profound transformation in their understanding of themselves and their relationships with others.