The interaction between Montag and Clarisse is quite interesting. She, a young girl, is the one person who helps to spark ideas in Montag's mind which then leads him to question everything about his society. One of the most affecting questions posed by Clarisse to Montag is when she asks him if he is happy. Later that night, Montag reflects upon Clarisse's question and his interaction with her. It is clear that she has had a profound impact on him.
What incredible power of identification the girl had; she was like the eager watcher of a marionette show, anticipating each flicker of an eyelid, each gesture of his hand, each flick of a finger, the moment before it began.
Another striking moment in the first section, "The Hearth and the Salamander," is when Montag and the firemen go to the old woman's house to burn her books. The woman chose to stay and burn with her books. This also has a huge impact on Montag and implores him to know what is so special about books. Speaking to Mildred about the old woman, Montag says:
You weren't there, you didn't see," he said. "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."