At the core of A Course in Miracles is just a non-denominational method of spirituality that encourages pupils to issue their preconceived notions about fact, the self, and the world. The writing is divided into three pieces: the Text, the Workbook for Pupils, and the Guide for Teachers, each offering a specific perception on the product presented. The core teachings of ACIM may be distilled into several crucial principles.

One of the central themes of ACIM is the thought of forgiveness. The Program teaches that forgiveness is not just pardoning some body because of their wrongdoings, but rather, it is the recognition that there is nothing to forgive. It asserts that what we see as a course in miracles wrongdoings are eventually the result of our own misperceptions and projections. In forgiving the others, we are, actually, forgiving ourselves. ACIM stresses that forgiveness is a way to inner peace and liberation from the burdens of resentment and anger.

Still another essential concept of A Course in Miracles may be the idea that the physical world is definitely an illusion. It posits that our physical activities are unreliable signs of fact and that true perception can only just be performed by way of a shift in consciousness. The Program distinguishes involving the "real life," which is really a state of peace and oneness beyond the material region, and the "vanity earth," known by fear, separation, and conflict. In accordance with ACIM, our major purpose is to awaken from the desire of the pride world and go back to the awareness of our heavenly nature.

ACIM also presents the idea of the Sacred Spirit as helpful tips and teacher within the individual. That religious existence is seen as the origin of motivation and knowledge, supporting us make possibilities that lead people nearer to reality and from illusion. The Program shows that through our willingness to hear the Holy Spirit's guidance, we could entry a greater comprehension of our purpose and the way to healing.