For what we mean by "understanding" or "comprehension" is seeing how parts fit into a whole, and then realizing that they don't compose the whole, as one assembles a jigsaw puzzle, but that the whole is a pattern, a complex wiggliness, which has no separate parts. Parts are fictions of language, of the calculus of looking at the world through a net which seems to chop it up into bits. Parts exist only for purposes of figuring and describing, and as we figure the world out we become confused if we do not remember this all the time.
But I define myself in terms of you; I know myself only in terms of what is "other," no matter whether I see the "other" as below me or above me in any ladder of values.
the more resolutely you plumb the question "Who or what am I?"—the more unavoidable is the realization that you are nothing at all apart from everything else.
the ego may reassert itself with the insidious "I-can't-help-myself" play in which the ego splits itself in two and pretends that it is its own victim.