I went to a headless workshop in Portland a couple of weeks ago. It was led by Richard Lang, who did an excellent job - making it simple, accessible, very clear, and doing it all in a very personable and heart-centered way.
One of the things that became clearer to me is how the headless experiments help us differentiate between our 3rd and 1st person identities.
Our 3rd person identity is how other see us. It is our appearance at different distances, our name, our age, occupation, and so on. It is our identity in the world, as a human being. It is ourselves, as a he, she or it.
Our 1st person identity is our immediate experience of ourselves, which is as no thing allowing all things, no form allowing all forms, emptiness allowing fullness, no color allowing all colors, no identity allowing all identities... or in other words as headless, as capacity for the world, as awake emptiness and its content (which is no other than this awake emptiness). It is ourselves as awake void and all forms as this same awake void.
When our 3rd and 1st person identities are confused, it leads to suffering. When they are seen as distinct from each other, there is clarity and a sense of ease.
When they are mixed up with each other, my first person identity tends to go in the background, and is sometimes not noticed at all. I take on the third person identity and become a thing in the world, up against innumerable other things. I am completely caught up in a world of desire, fear, longing, anger, sadness, loss, and much more.
When they are differentiated, I am awake void full of the world... I am free from anything happening, allowing it all, and everything happening is revealed as this awake void. And there is full freedom for the little one, this human self, to use the 3rd person identity to function in the world as well. Nothing is left out.