explain Faber's role in the novel. Why was he included?

An aging intellectual in a world with no place for such people, Faber greatly disapproves of the dehumanized, oppressive society in which he lives. However, Faber feels it is safer to live discreetly rather than protest or attempt to change the world. Faber and Montag first met years ago in a park and after a long discussion about books, gave Montag his contact information. After Montag is taken in by the magic of books, he seeks Faber out and together, the two men try to work together against their oppressive society. Faber is a mentor figure to Montag. He advises Montag on his new journey and helps him rebel against the establishment.