for Stephen Hawking

When we wake up brushed by panic in the dark

our pupils grope for the shape of things we know.

Photons loosed from slits like greyhounds at the track

reveal light’s doubleness in their cast shadows

that stripe a dimmed lab’s wall — particles no more —

and with a wave bid all certainties goodbye.

For what’s sure in a universe that dopplers

away like a siren’s midnight cry? They say

a flash seen from on and off a hurtling train

will explain why time dilates like a perfect

afternoon; predicts black holes where parallel lines

will meet, whose stark horizon even starlight,

bent in its tracks, can’t resist. If we can think

this far, might not our eyes adjust to the dark?