"The past is no insubstantial, thready thing, sunlight slanting
through shutters into cool rooms, pools and standards of mist
adrift at roadside, memories that flutter from our hands the
instant we open them. Rather is it all too substantial, bluntly
physical like a boulder or cement block growing ever denser,
ever larger, there behind us, displacing and pushing us forward.
And yes: in its mindless, rocklike, solid, unstoppable way,
it pursues us."
--from Eye of the Cricket, James Sallis