The circle of day and night is the law of the classical world: the most restricted but most demanding of the necessities of the world, the most inevitable but the simplest of the legislations of nature.This was a law that excluded all dialectics and all reconciliation, consequently laying the foundations for the smooth unity of knowledge as well as the uncompromising division of tragic existence. It reigns on a world without darkness, which knows neither effusiveness nor the gentle charms of lyricism. All is waking or dreams, truth or error, the light of being or the nothingness of shadow.