I does not differ across time and space. I refers to the spaciousness of being which does not take on the qualities of thought and does not change as our experience changes.
When we say I we are always referring to that spaciousness.
It is as I that we are one. The I is indivisible, non dual.
Isn’t it amazing that we all share this one I? That we all are this one I?
What a wonder. That is what love 💗 is. This wholeness. 
Indivisible oneness.