The Curtains in the House of the Metaphysician

It comes about that the drifting of these curtains
Is full of long motions, as the ponderous
Deflations of distance; or as clouds
Inseparable from their afternoons;
Or the changing of light, the dropping
Of the silence, wide sleep and solitude
Of night, in which all motion
Is beyond us, as the firmament,
Up-rising and down-falling, bares
The last largeness, bold to see.