The teachings of the Course are non-dualistic teachings. If you go back into ancient China or again into India, you would've heard of Advaita Vedanta. Advaita really implies “not two,” and that's a strategy for discussing the fact that there's a oneness which connects us all. The term “Understanding” is https://www.youtube.com/channel/UCTleG6-484F7WHZD0hAjRRw