What ruins your sleep is not the tapping shutters,
Not promised dark that flashes of light rescind,
But the saying of your name, your name through gasps and stutters —
The voice that calls implacably in the wind.
What though you have the wherewithal —
The pressures high and low — and calculations approach
The limits of the known wherein will perish all
Saints’ proofs and mathematician’s parable;
Yet still this faithless faith is terrible;
Uncounteds unaccountably encroach
Into the sanctity of the invariable
At night when Earth’s inanimate beings broach.
What though – (archaic) What does it matter if…; even if it is true that….
Pressures high and low – Changes in atmospheric pressure cause the wind.