Arrive at an extensive knowledge of the metaphysics of the Course in Miracles as a result of a mix of audio/video resources and Q&A dialogues with David Hoffmeister. Robert T. Carroll wrote the teachings are usually not original but are culled from "various sources, east, and west". He adds that https://www.youtube.com/channel/UCXpL4OXSmktqlP6_S5p5jIQ