Nonduality is not an understanding. It is not something that happens in your brain. It’s not something that can be written down or explained with any sort of words, because it uses the bigger part of our consciousness that sees and knows things as they are happening. Like when you know the answer to something, what part of it is that? What part of you is it that knows? It’s not an understanding you can have, like when you figure out a math problem and you’re like, “Oh, that’s how it works.” It took the part of your brain that understands things to figure the problem out, but it took that full you at that moment where you’re suddenly like, “Oh, I understand that.” It’s who is doing the understanding, not the understanding itself.