In Fahrenheit 451 what does Montag realize after he kills beatty?

In 'Fahrenheit 451,' Beatty at one time read books like Montag, but with a difference. He found the knowledge was not worthwhile, found he liked his life compartmentalized and controlled, and became nihilistic about the experience. Montag, on the other hand, develops a hunger for knowledge that inspires him to go the extra mile and do whatever it takes to acquire it. Understanding that becoming like Beatty is the end result of not attempting to understand, Montag knows he has to acquire knowledge rather than just books.