Why does Beatty come to visit Montag after the book-burning at the elderly woman’s home?

In part 1, after the book-burning at the woman's home, Beatty pays a visit to Montag. There are two reasons for this visit. First of all, Montag is sick and does not go to work that evening. This is unusual for Montag: he has never had a sick day before, and Beatty is obviously concerned by his absence.
Secondly, Beatty senses that Montag is having doubts about the fireman system, as we see in the text:

Every fireman, sooner or later, hits this. They only need understanding, to know how the wheels run. Need to know the history of our profession.

Beatty, therefore, uses his visit to educate Montag on the history of the fireman profession, paying particular attention to the fact that it was the people who wanted censorship. In other words, censorship was not something that was enforced by the government. It is Beatty's hope that this history lesson will allay some of Montag's doubts about the system.
What we find, however, is the very opposite. Montag's interest in learning about books will not be dampened, prompting him to visit Faber and learn the truth about censorship.