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