There's no following statements but it Develops and changes over time to accommodate findings
Many events lead Guy Montag to become what he is by the end of the of the novel. However, some of the more notable events are his walks with Clarisse since the conversations the two have had changed the views of Montag. Before Clarisse came, Montag was another blind follower of society, but Clarisse was able to open his mind. Another notable event that helped Montag become the person he was is the when he was sent out to raid a woman's home and burn down her books, since it was his job. Going to the woman's house began a series of events which lead Montag become the person he was int eh book. As he was raiding this woman's house, he steals a book for the first time and reads it at home even though it was against the law. This single occurs lead to more as the story went on which slowly formed Montag into the person he was. There are many more events that have changed Monatg greatly, but these two are the more important events.
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Yes he is and he was a very smart man.