Discontinuity becomes continuity only once it has entered the movie-viewer. It is a purely interior phenomenon. Outside the viewing subject there is no movement, no flux, no light in the mosaics of light and shadow that the screen always displays in stills. But within ourselves, we get the impression that is, like all the other data of the senses, an interpretation of the object, that is to say, an illusion, a ghost.

– Jean Epstein, The Intelligence of a Machine