The following quote belongs to Montag, he makes this statement in reference to an old woman whose house the fireman had to break into in order to burn the books she was secretly keeping in her attic.
What strikes Montag is that the old woman would rather die with the books than give them up. Her behavior causes Montag to feel confused about his own life. He suffers from a feeling of alienation from the society in which he lives that prohibits books, and where fireman set fires instead of putting them out.
"There must be something in books, things we can't imagine, to make a woman stay in a burning house; there must be something there. You don't stay for nothing." (Bradbury, pg. 51)
Captain Beatty makes the following comment to Montag during a book burning. Montag is feeling very uncomfortable and guilty because he has secretly kept a book.
It is an unusual conversation where Beatty, who contends to not care about books knows a lot about different works and quizzes Montag with quotes. This only makes Montag more nervous, because he thinks that Beatty knows that he is beginning to question their way of life.
"What traitors books can be! You think they're backing you up, and they turn on you. Others can use them, too, and there you are, lost in the middle of the moor, in a great welter of nouns and verbs and adjectives." (Bradbury, pg. 107)