[A] [movie] still, which allows one to linger over a single moment as long as one likes, contradicts the very form of film, as a set of photographs that freezes moments in a life or a society contradicts their form, which is process, a flow in time. The photographed world stands in the same, essentially inaccurate relation to the real world as stills do to movies. Life is not about significant details, illuminated [by] a flash, fixed forever. Photographs are.
Susan Sontag – On Photography