We know that an object that is not consciously noticed at the time of a first visit can, by its absence during subsequent visits, provoke an indefinable impression: as a result of this sighting backward in time, the absence of the object becomes a presence one can feel.
Guy Debord, Ivan Chtcheglov, Asger Jorn, Raoul Vaneigem, Mustapha Khayati (2014). “Situationism: A Compendium”, p.9, Bread and Circuses Publishing
