Each time that there is a metaphor, there is doubtless a sun somewhere; but each time there is sun, metaphor has begun. If the sun is metaphorical always, already, it is no longer completely natural. It is always, already, a luster, a chandelier, one might say an artificial construction, if one could still give credence to this signification when nature has disappeared. For if the sun is no longer completely natural, what in nature does remain natural?
Jacques Derrida, ‘White Mythology’