"A graphic representation of data abstracted from the banks of every computer in the human system. Unthinkable complexity. Lines of light ranged in the nonspace of the mind, clusters and constellations of data. Like city lights, receding"

In this quote, William Gibson is explaining the huge amount of data that exists within the human system. He utilizes the metaphor of a graphic representation to communicate the concept that this information is organized and structured, just like a map or chart. However, he also highlights the complexity of this information by calling it "unimaginable". Using light images, such as "lines of light" and "clusters and constellations", contributes to the abstract and intangible nature of this data. Gibson likewise compares it to city lights, suggesting that this information is constantly evolving and broadening, just like a cityscape. Overall, this quote highlights the frustrating and detailed nature of the information that exists within the human system.