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