2000 yrs back, we didn’t have Sigmund Freud. We didn’t have all of these teachings about the unconscious guilt, protection mechanisms, the Moi, and the like. A Course in Miracles employs the teachings of psychology, the teachings and terminology of training, and What's more, it works by using Christian terminology. https://www.youtube.com/channel/UCXpL4OXSmktqlP6_S5p5jIQ