A Course in Miracles...

a spiritual self-study course published in 1976, represents an explicitly idealist, pure nondualistic thought system. In the Course, only God and His Creation, which is Spirit and has nothing to do with the world, are real. The physical universe is an illusion and does not exist. The Course compares the world of perception with a dream. It arises from the projection of the dreamer, i.e. the mind ("projection makes perception," T-21.in.1:5), according to its wishes (perception "is the outward picture of a wish; an image that you wanted to be true," T-24.VII.8:10). The purpose of the perceptual world is to ensure our separate, individual existence apart from God but avoid the responsibility and project the guilt onto others. As we learn to give the world another purpose and recognize our perceptual errors, we also learn to look past them or "forgive," as a way to awaken gradually from the dream and finally remember our true Identity in God. The Course’s nondualistic metaphysics is similar to Advaita Vedanta. However, A Course in Miracles differs in that it adds a "motivation" for the illusory existence of the perceptual world (for a further discussion, see Wapnick, Kenneth: The Message of A Course in Miracles, 1997, ISBN 0-933291-25-6).