n order to respect this strange movement within language, in order not to reduce it in turn, we would have to attempt a return to the metaphor of darkness and light (of self-revelation and self- concealment), the founding metaphor of Western philosophy as meta- physics. The founding metaphor not only because it is a photological one—and in this respect the entire history of our philosophy is a pho- tology, the name given to a history of, or treatise on, light—but because it is a metaphor. Metaphor in general, the passage from one existent to