The teachings of the Course are non-dualistic teachings. In case you return into ancient China or back into India, you would have heard of Advaita Vedanta. Advaita actually means “not two,” and that's a technique for speaking about The very fact that there is a oneness which connects us all. https://www.youtube.com/channel/UCTleG6-484F7WHZD0hAjRRw