First, please watch the video below. It’s 12:46 so you can do this in a short time.
Does everything exist as non-dual? Everything has a mere appearance, but does any of it have essence? Nothing has individual essence, therefore everything is non-dual as we perceive it as mere appearance of essence, when it is in fact empty.
Geshe-la mentions form as body, but form is everything. Body is made up of mountains and rivers, goats and birds, air and fire. Form is everything we perceive in a dual nature, which is really non-dual. Form is ever changing, flowing, shifting, walking like mountains walk. Stillness and emptiness are non-dual. Stillness is perceived, when really nothing is ever still. Even in physics we see that atoms are constantly vibrating, gravity is working on our atoms making them move around each other like planets and suns. Stillness exists only in the present moment, only to our perception, but really, form is empty of stillness. Form is empty of form.
If the world exists as non-dual, why do we perceive it as dual? Our attachment to ignorance and self-grasping. By recognizing the non-dual nature of things we can be released from attachment, grasping, avidya.
A quote came to mind: “When the wave forgets that it is the ocean, that forgetting process is Avidya.” We are each waves in the vast ocean of non-dual existence, and we have forgotten that we are part of the ocean.