Come to an extensive knowledge of the metaphysics of the Course in Miracles by means of a combination of audio/movie resources and Q&A dialogues with David Hoffmeister. Robert T. Carroll wrote which the teachings will not be authentic but are culled from "many resources, east, and west". He provides that https://www.youtube.com/channel/UCXpL4OXSmktqlP6_S5p5jIQ