The teachings of the Course are non-dualistic teachings. In case you return into historical China or back again into India, you would have heard about Advaita Vedanta. Advaita basically usually means “not two,” and that's a way of talking about the fact that there's a oneness which connects us all. https://www.youtube.com/channel/UCTleG6-484F7WHZD0hAjRRw