But self or person is not any one impression, but that to which our several impressions and ideas are supposed to have a reference. If any impression gives rise to the idea of self, that impression must continue invariably the same, through the whole course of our lives; since self is supposed to exist after that manner. But there is no impression constant and invariable. Pain and pleasure, grief and joy, passions and sensations succeed each other, and never all exist at the same time. It cannot therefore be from any of these impressions, or from any other, that the idea of self is derived; and consequently there is no such idea.
♦ David Hume, “Section VI: Of Personal Identity,” A Treatise of Human Nature (1739)
It is quite alarming, setting oneself to task, and then delving within—intent on discovering the boundaries of the self; but there is no discernable source, no border between what is and what is not that which perceives. What there is to discover are the echoes of impressions, insistent but also imperfectly rendered, clustered nebulously about the now, as you cast the net of consciousness blindly out into a murky sea. What you retrieve is not verifiable by some organizing standard, some principle of meta-consciousness; what pieces you have are rather the constituents of what itself becomes aware. Is there a voice that travels between points of reference, generated independently of the lingering instances of a heterogeneous sensorium that organize to produce something called personal history? As far as I can tell, my boundary is the space where my thoughts turn back to reinscribe themselves over their own premise. Perhaps I am a spontaneous generation, a misinterpretation of available phenomena. Perhaps it is all simulation.