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Alhazen of Basra
If I could travel a thousand years back
to August 1004, to a small tent
where Alhazen has fallen asleep among books
about sunsets, shadows, and light itself,
I wouldn’t ask whether light travels in a straight line,
or what governs the laws of refraction, or how
he discovered the bridgework of analytical geometry;
I would ask about the light within us,
what shines in the mind’s great repository
of dream, and whether he’s studied the deep shadows
daylight brings, how light defines us.