The photographer, like an acrobat, must defy the laws of probability or even of possibility; at the limit, he must defy those of the interesting: the photograph becomes surprising when we do not know why it has been taken.
Roland BarthesFor the photograph's immobility is somehow the result of a perverse confusion between two concepts: the Real and the Live: by attesting that the object has been real, the photograph surreptitiously induces belief that it is alive, because of that delusion which makes us attribute to Reality an absolute superior, somehow eternal value; but by shifting this reality to the past ("this-has-been"), the photograph suggests that it is already dead.
Roland Barthes