I keep noticing how this perceptual center - this physical body and especially this head with its eyes, ears, nose and mouth - is made into a center for a sense of a separate I.
There is a sense of a separate I, as a belief in an idea of a separate self, almost as a weird cardboard cutout in the mind. Then there is a looking for a good place to put this sense of a separate I, a good anchor for it. And then the - very understandable - decision to place it on this body, especially this head, and in particular on sensations in the head area, and even more specifically on sensations of tension, contraction and density in the head area.
It is really quite funny... although it sometimes has quite tragic consequences.
And this process of making a perceptual center into a center for a separate-self sense is of course why the headless experiments can be so effective. They bring our attention directly to the physical center of a sense of I, and reveal that there is nothing there. No thing, allowing all the things of the world, including those sensations previously used as an anchor for a sense of a separate I.
Brilliantly awake emptiness, a spaceless, timeless, crystal clear void, allowing all the forms of the world (as perceived by this body) to arise within and to it, and as nothing other than awake emptiness itself.