Faber is critical of himself because he feels guilty for having said nothing when this society began to change. He felt that there was a time when he had an opportunity to stop things from happening, from books being destroyed because he was a great mind, but he said nothing for the very reason the society changed- not to upset anyone or the balance of things. In keeping silent he feels he contributed to the almost irreversible changes that have taken place.
He is not entirely willing to become Montag's mentor, in fact he refuses to do so at first, but then Montag threatens him into it. Montag has brought a copy of the Bible and Faber is fascinated and overwhelmed with its presence. After refusing to teach Montag, Montag begins to burn pages of the sacred book before Faber's very eyes until he is finally forced to agree so the burning of this rare treat can cease.