"He began to keep a diary - a photographic diary, of course. [...]
He got the idea of composing a catalogue of everything in the world that
resists photography, that is systematically omitted from the visual field
not only by cameras but also by human beings. On every subject he spent days, using up whole rolls at intervals of hours, so as to follow the changes of light and shadow. One day he became obsessed with a completely empty corner of the room, containing a radiator pipe and nothing else: he was tempted to go on photographing that spot and only that till the end of his days."


Italo Calvino, The Adventures of a Photographer.