Hal Incandenza, though he has no idea yet of why his father really put his head in a specially-dickied microwave in the Year of the Trial-Sized Dove Bar, is pretty sure that it wasn’t because of standard U.S. anhedonia. Hal himself hasn’t had a bona fide intensity-of-interior-life-type emotion since he was tiny; he finds terms like joie and value to be like so many variables in rarified equations, and he can manipulate them well enough to satisfy everyone but himself that he’s in there, inside his own hull, as a human being — but in fact he’s far more robotic than John Wayne. One of his troubles with the Moms is the fact that Avril Incandenza believes she knows him inside and out as a human being, and an internally worthy one at that, when in fact inside Hal there’s pretty much nothing at all, he knows. His Moms Avril hears her own echoes inside him and thinks what she hears is him, and this makes Hal feel the one thing he feels to the limit, lately: he is lonely.
Infinite Jest, Page 694.