2000 decades back, we didn’t have Sigmund Freud. We didn’t have all of these teachings regarding the unconscious guilt, defense mechanisms, the ego, etc. A Course in Miracles uses the teachings of psychology, the teachings and terminology of education and learning, and In addition it takes advantage of Christian terminology. https://www.youtube.com/channel/UCXpL4OXSmktqlP6_S5p5jIQ