A Course in Miracles (also often called ACIM or even the Course) is usually a 1976 guide by Helen Schucman. The underlying premise is always that the greatest "miracle" may be the act of simply attaining a full "consciousness of love's presence" in somebody's daily life. (Only God is actual. https://www.youtube.com/channel/UCXpL4OXSmktqlP6_S5p5jIQ