What hinders the narrators recording all of his thoughts and feelings in the books anthem by any rand?

In "Anthem" by Ayn Rand, the narrator is hindered from freely recording all of his thoughts and feelings due to the oppressive collectivist society he lives in. The society discourages individuality and independent thinking, forcing the narrator to suppress his true emotions and conform to the norms of the group. Additionally, the fear of retribution or punishment for going against the established rules and beliefs further restricts the narrator from expressing his innermost thoughts.