ABSTRACT
Lucidity as a noun is similarly defined in terms of clarity and clairvoyance but also as a capacity of penetration or perspicacity. Reviewing the familiar definitions of the lucidity reminds the extent to which everyday language of perception of intelligence and knowing is shot through with the metaphorical language of light and vision. Maurice Blanchot's language slips between a phenomenological understanding of light as the medium in which the world of appearance shows itself as presence, and a metaphorical language of light understood as the clarity and distinctness of certain knowledge of the world of appearances. Graham Harman is best known as one of the founding members of the contemporary philosophical movement called speculative realism'. Harman's innovation in relation to the phenomenological account of luminous appearance argues that the withdrawal into obscurity that has been highlighted in different ways in Heidegger, Blanchot, and Merleau-Ponty is in fact a characteristic or property of all objects and entities.
