• While a painting, even one that meets photographic standards of resemblance, is never more than the stating of an interpretation, a photograph is never less than the registering of an emanation (light waves reflected by objects) — a material vestige of its subject in a way that no painting can be.

    Susan Sontag: While a painting, even one that meets photographic standards of resemblance, is never more than the stating of an interpretation, a photograph is never less than the registering of an emanation (light waves reflected by objects) — a material vestige of its subject in a way that no painting can be.
    "On Photography".