All are appearances of the same underlying reality. Vevek under put it very well. He said, one only exists. It appears as nature and soul. Nature means universe, soul, you te but it's one underlying thes one underlying reality. Mister ecarts, beautiful, not ecatole. 500 years ago, a his wonderful statement, the ground of my soul and the ground of god are the same ground. So that is the yoga that is being taught by chrishna arjuna at this point,. would have given a dry smile and would have said, thank you for the philosophy lecture, but i'm still not convinced. It doesn't work.