The mirror is thus at once an object among others and an object different from all the others, evanescent, fascinating. In and through the mirror, the traits of other objects in relationship to their spacial environment are brought together; the mirror is an object in space which informs us about space, which speaks of space. In some ways a kind of picture, the mirror too has a frame which specifies it, a frame that can be either emptied or filled. Into that space . . . the mirror introduces a truly dual spatiality; a space which is imaginary with respect to origin and separation, but also concrete and practical with respect to coexistence and differentiation.
Henri Lefebvre, The Production of Space










