Montag is talking to Faber in this quote. He’s finally realized how lonely he lives, due to all of the technology that his wife has surrounded herself with. When Montag finally found someone to talk to, Clarisse, she was, most likely, killed by the government. Montag doesn't have anyone to talk to because everyone else is too busy talking to their “family” on the walls. For Montag the walls are yelling at him because they're everywhere. Talking about unnecessary things. Pretending to be a family. Montag can't talk to his wife, Mildred, because she has been consumed by technology. Also Mildred doesn't seems to care what Montag has to say, she's childish and fake, therefore making Montag more like her babysitter than her husband. The saying that
