Trivia: In the book, Aaron does not have a stutter - the stutter was introduced for the film because when Edward Norton auditioned for the part, he did the lines with a stutter and it won him the part.
Trivia: The part of Aaron Stampler was originally written for Leo Dicaprio. He turned the role down and it was given to Edward Norton.
Answer: Later in the film it's said B32 is a catalog code for the book "The Scarlet Letter", page 156. On that page was an underlined passage "No man, for any considerable period, can wear one face to himself and another to the multitude without finally getting bewildered as to which may be the true..."
Bishop73