Ask someone who they are and they will almost certainly begin with their history. They will tell you where they grew up, what they studied, who they loved. Identity, it seems, is inseparable from memory. But if that is true, what happens to a person when their memories begin to fade?
The philosopher John Locke argued in the seventeenth century that personal identity is constituted by continuity of consciousness. You are the same person you were ten years ago not because your body is the same — most of your cells have been replaced — but because you remember being that person. Memory, on this view, is not merely a record of the self; it is the self.
This position, compelling as it is, raises uncomfortable questions. Memories are notoriously unreliable. Neuroscience has shown that every time we recall an event, we subtly reconstruct it, shaping it in light of what we now know. We do not remember the past — we narrate it. And narrators, inevitably, distort.
If our memories are malleable, then so too is our identity. This might explain why trauma can so profoundly alter a person's sense of self, or why two people who lived through the same event can give radically different accounts of it.
Perhaps the deepest insight is this: we are not the sum of what happened to us, but of how we have chosen to interpret and integrate those experiences. Identity is less a possession than a practice — an ongoing act of narration that never quite reaches its final chapter.