The teachings on 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 basically suggests “not two,” and that is a strategy for referring to the fact that there is a oneness which connects us all. https://www.youtube.com/channel/UCTleG6-484F7WHZD0hAjRRw