Using words of opposites is a good way to describe the world. The problem is that we have been taught to live in a projection of our mind, and this causes a lot of confusion.
Nonduality is telling us that you are not this projection. Most specifically, you are not that voice that constantly goes in your head—you know, how it just goes on and on and on. It sounds very, very loud. But you are not it. That voice gives the feeling of “Two-ness.”
But you are a singularity. The singularity of awareness that is living your human being life in a world full of life and unity. So when you drop your addiction to this projection, then you become the unity of everything. And that’s what Nonduality means.