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