The teachings of the Course are non-dualistic teachings. Should you go back into historical China or back into India, you would've heard about Advaita Vedanta. Advaita basically means “not two,” and that is a technique for speaking about The actual fact that there is a oneness which connects us all. https://www.youtube.com/channel/UCTleG6-484F7WHZD0hAjRRw