The teachings in the Course are non-dualistic teachings. Should you go back into ancient China or back into India, you would've heard about Advaita Vedanta. Advaita in fact usually means “not two,” and that's a means of referring to The very fact that there is a oneness which connects us https://www.youtube.com/channel/UCTleG6-484F7WHZD0hAjRRw