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