We might express this as "all persons are I" or rather as "you and I are the same person". - Arnold Zuboff

[M]y self-interest reaches fully into the life of every conscious organism, each of which I equally am, and that the death of any one of these does not annihilate me so long as there still is any other conscious thing anywhere in all reality—since I will be that thing. And every experience in any time is experienced by me with all the same urgency of its happening now. All of it equally is mine and now.

An experience must be a universal across times as well as across brains. This experience of being you, here now, would be numerically the same whenever, as well as wherever, it was realized.

I am countless conscious organisms, but each of these possesses only one package of experiential content, isolated from that of every other. And within any of these packages only that much of the content of experience is displayed as having the quality of immediacy that makes experience be mine. So being mine is naturally confused in each with being the experience of only that organism. One must be jolted into realising that being mine is instead an abstract quality like being red. And, further, that this is a quality that must pervade all experience. For what could count as experience that didn't have that quality? I hope that I have succeeded now in doing that jolting.