2000 decades in the past, we didn’t have Sigmund Freud. We didn’t have all of these teachings concerning the unconscious guilt, protection mechanisms, the ego, etc. A Course in Miracles uses the teachings of psychology, the teachings and terminology of instruction, and What's more, it takes advantage of Christian terminology. https://www.youtube.com/channel/UCXpL4OXSmktqlP6_S5p5jIQ