The teachings with the Course are non-dualistic teachings. Should you go back into historic China or again into India, you would've heard about Advaita Vedanta. Advaita actually implies “not two,” and that's a technique for discussing the fact that there's a oneness which connects us all. ACOL by itself acknowledges https://www.youtube.com/channel/UCTleG6-484F7WHZD0hAjRRw