I'm thinking of a trending metaphor. After half a lifetime of labour, retirement feels like pitching yourself over the sticky glow of the honey-dew event horizon into the oblivion of a black hole. Edging closer, you peer into a black as deep as your own cornea. Up close, you witness your existential erasure in the maw of an absent nothing. What astrophysicists call the "singularity." Then it becomes more complicated and you hear Steven Hawking's hunch that black holes sport an exit.