“… between the absence of its object and the evidence of its past existence…”

Madness is an image that resides between the absence of its object and the

evidence of its past existence. Such an image mediates between the visible

absence and the ‘improbable’ evidence of a past, effective materiality (some

would call this a ‘truth’). This mediation–the medium–is, hence, a

hallucination…

–Roberto Valaco, Notebooks (II, 11a, excerpt)