What Makes You the Same Person Over Time? | Rebecca Goldstein
Why It Matters
Reframing personal identity around an instinct to matter has practical implications for psychiatry, end-of-life judgments, legal/personhood debates and how we understand motivation and moral responsibility. It suggests interventions that restore or acknowledge self-mattering could be central to treating depression and adjudicating when someone should be considered the same person over time.
Summary
Philosopher Rebecca Goldstein argues that a human’s persistent sense of self is rooted not merely in biological or informational continuity but in an instinct to matter to oneself — a commitment to one’s own persistence she links to Spinoza’s conatus. She illustrates this with personal examples (the unconditional commitment to her daughters and to herself), a striking anecdote of seeing her reflection as another person, and contrasts persistence with cases like brain death or depression where that self-mattering fades. Goldstein says mattering need not be objectively justified — even erroneous or valenced caring still underpins identity — and treats it as a complementary lens alongside physical and narrative accounts. Ultimately she frames mattering as the engine that ties emotional life, motivation and life-story together to produce continuity of personhood.
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