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