Nickolas Grabovac:
This makes me wonder, are not-self and not-other two sides of the same coin?
Appears so, yes

What applies to you also applies to everyone else through you, since you create both yourself and others: you know no one and no one knows you. Also not-self and self are two-sides of the same coin as well.
I had some similar experiences myself yesterday, it's super fascinating to explore this selfless territory, but also somewhat horrific. Keep reporting what you stumble across, it's interesting to read, you have a straightforward way of writing which I appreciate...