The teachings from the Course are non-dualistic teachings. If you return into ancient China or again into India, you would've heard about Advaita Vedanta. Advaita in fact means “not two,” and that is a technique for speaking about the fact that there's a oneness which connects us all. For me https://www.youtube.com/channel/UCTleG6-484F7WHZD0hAjRRw