Some days, who can stare at swathes of sky, leafage and bad-complected whale-gray streets, tailpipes and smokestacks orating sepia exhaust, or the smaller enthusiasms of pistil and mailbox key, and not weep for the world's darks on lights, lights on darks, how its half-tones stay unchanged in their changings, or how turning wheels and wind-trash and revolving doors weave us into wakefulness or dump us into distraction?