In the tenth book of the Republic, Socrates differentiates the maker of an object, such as a bed, made in accordance with the Idea of the thing (this is its eidos or form) , from the artist, proceeding in a quick and easy fashion, as if using a mirror. But "What should a painting be called," asked Alberti, "except the holding of a mirror up to the original as in art?"
For Leibniz, each monad is a world in itself, a self-contained cosmos that mirrors the whole universe in its own way. But all these individual worlds are united with one another through a preestablished harmony, inasmuch as they are expressions of the same universal order. The blind man in Diderot's Lettre sur les Aveugles could conc eive of mirrors only as machines that create three-dimensional images of ourselves. "Un mirroir est une machine qui nous met en relief hors de nous-même."
In The Mirror and the Lamp, M.H. Abrams contrasts two antithetic metaphors of mind, one comparing the mind to a reflector of external objects, the other to a radiant projector which makes a contribution to the object it perceives. The former was characteristic of much of the thinking from Plato to the eighteenth century, (based on a concept of representation) while the second typifies the prevailing romantic conception of the poetic mind. (see imagination) The concept of illumination carries a religious connotation as well-- in the act of grace and revelation.
In Philosophy and the Mirror of Nature, Richard Rorty proposes to move beyond epistemological philosophy that concerns itself with"accurate representation," in favor of a pragmatist conception of knowledge which eliminates the Greek contrast between contemplation and action, between representing the world and coping with it. (pp10-11)
