When dealing super heavy abstract concepts like this article talks about, I am always afraid I just didn’t quite understand it. But if I did I would have to say that I don’t think the two-ness system you describe and the ‘witness’ are as distinct as you think. When I look beyond my perceptions and experience to examine myself the way you describe the witness doing, I don’t feel as if anger, fear, and all the negativity associated with my two-ness goes away, I just feel as if am temporarily disasociateing myself from my subjective experiences and imagining myself in someone else’s shoes. It is of course possible that I have simply not achieved a glimpse of Nirvana like you have! 😢