Observed from without, human beings obviously have a natural lifespan and cannot live much longer than a hundred years. A man’s sense of his own experience, on the other hand, does not embody this idea of a natural limit. His existence defines for him an essentially open-ended possible future […] Viewed in this way, death, no matter how inevitable, is an abrupt cancellation of indefinitely extensive possible goods. Normality seems to have nothing to do with it
From Thomas Nagel’s essay “Death”, quoted by Matt Sigl in response to Colin McGinn’s musings about “Why is death bad?”