What Is the Yin Yang Cosmology?

The Yi Qing is maybe the oldest text that has the yin yang cosmology stuff in it. I think the greatest development of that cosmology happened in the Han, and there's a whole lot of reading back into the text. In some respects, this can be read as philosophy, but it's also, in a sense, kind of cosmology in that you have to have an act of element. There has to be something that motivates movement and change and action. And I thought last time, and I might be hallucinating because I don't even know who I am anymore, but that's good. You're empty, you're becoming empty.