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