So, it's Satan playing the role that Prometheus played in ancient Olympian religious belief—defying the all-powerful sky god to bring the benefits of knowledge (the technology of fire, in poor old Prometheus's case) to shivering humanity. And savagely punished for it as well. The difference was that Prometheus was eventually freed from his torment by Heracles; no such eventual liberation shows up in Christian theology for Lucifer, so far as I'm aware... but the other parallels are very suggestive. The later versions of the Prometheus myth, for example, explicitly identify a broad range of knowledge as the distinctive contribution made by Prometheus to human development, and the essence of his transgression against Zeus (who comes off as a kind of angry, overbearing tyrant, compared to the Titan). And knowledge was what it was all about in the Genesis story, eh?