The Grid, as I understand-- and I am new to the concept as well-- is the societal system developed within the environment of a machine's circuits. Impossibly-- the day to day running of an electronic processor represented as a city of autonomous beings, 'programs' with individual motive and personality.

Humans can through some means be transmuted inside it, becoming part of the system without harming the machine. [Isn't this amazing? her tone implies. Isn't this bewildering and fascinating?]