In Fahrenheit 451, according to Faber, what will bring the world back to books?
Faber notes that it is what is in books, not the books themselves necessarily, that has real meaning. But he does offer three conditions that books might be used effectively again. First, he notes that people must cease hating and fearing books. Faber says that books are feared because they have pores, texture, and detail. In other words, books are loaded with information and things that do not conform to the bland, unchallenged society that Faber and Montag currently live in. Therefore, for people to embrace books once again, they must be willing to be challenged by books that touch "real" reality and engage readers in deep thought: practices that do not occur in Montag's social world (sans with people like Faber and Clarisse.) The second thing necessary for books to be relevant is the leisure time to read and contemplate them. This leisure activity would have to take the place of the parlour shows: essentially trading a passive leisure practice for an active one (reading). The third condition Faber mentions is the right/ability to do things based on what is learned in reading:
And number three: the right to carry out actions based on what we learn from the inter-action of the first two.
Therefore, people would only come back to books if they are willing to be challenged and engaged in deeper thinking, if they are willing to take the time to read, and finally, if they are willing and allowed (by law or in revolt) to put into practice what they learn from reading.
As it stands when Faber and Montag have this conversation, their society prohibits these three conditions. The solution to achieve these three conditions is to change society and/or rebel or leave.