[May 1960]. “When I say that every visible is invisible, that perception is imperception, that consciousness has a “punctum caecum,” that to see is always to see more than one sees—this must not be understood in the sense of a contradiction—it must not be imagined that I add to the visible …a nonviable … One has to understand that it is visibility itself that involves a nonvisibility.

– Susan Sontag, Essays of the 1960s & 70s. New York, N. Y., The Library of America, 2013, 63.