In what way do Faber and Granger teach Montag?

Faber and Granger teach Montag mostly by telling him the way life used to be before books were banned.  They enlighten him about the learning that can be obtained through reading.  Faber teaches Guy also what happens when someone does nothing.  Faber laments over the fact that he saw the trend coming; he saw the book banning on its way and he did nothing to stop it. Even now, he breaks the law by having books, but he conforms to the law by hiding the books and trying to blend into the society.  He is an example of what not to be.  Granger is the opposite in that way.  Granger shows Montag what can be done if one is determined to preserve what is right.  Granger has courage that Faber lacks.  Granger helps Montag see that there is a way out of the mess of their current society by memorizing books to preserve them and by banding together to create a new, better, and more enlightened, society.  Granger tells Montag, at the end of the book, after the city has been annihilated, that they now have a chance to rebuild civilization and to rebuild it right.  He says, like a phoenix rising from the ashes of the destroyed civilization, they can rise again, better for having learned from their mistakes of the past.