Clarisse positively influences Montag to examine his meaningless existence and dramatically change the trajectory of his life. After meeting Clarisse, Montag analyzes his marriage and occupation and decides to pursue knowledge to become content and fulfilled.

How does Montag change when he meets Clarisse?

He starts to change when he meets Clarisse. For the first time in his life, questions whether he is happy. His safe world had "melted down and sprung up in a new and colorless form." From here on out, he starts questioning things. He starts asking questions about the people whose houses he burns.

How did Clarisse change Montag quotes?

She then tells Montag, Bet I know something else you don't. There's dew on the grass in the morning. Clarisse's comment influences Montag to contemplate the natural environment for the first time, and he cannot remember if he knew that there was dew on the ground in the morning.