A condition of pure reciprocity manifested by the observing and observed mirror, the two stages of which are uncoupled at the two lower corners of the picture: on the left the canvas with its back to us, by means of which the exterior point is made into pure spectacle; to the right the dog lying on the ﬂoor, the only element in the picture that is neither looking at anything nor moving, because it is not intended, with its deep reliefs and the light playing on its silky hair, to be anything but an object to be seen.