As the novel progresses, the children’s changing attitude toward Boo Radley is an important measurement of their development from innocence toward a grown-up moral perspective. At the beginning of the book, Boo is merely a source of childhood superstition. As he leaves Jem and Scout presents and mends Jem’s pants, he gradually becomes increasingly and intriguingly real to them. At the end of the novel, he becomes fully human to Scout, illustrating that she has developed into a sympathetic and understanding individual. Boo, an intelligent child ruined by a cruel father, is one of the book’s most important mockingbirds; he is also an important symbol of the good that exists within people. Despite the pain that Boo has suffered, the purity of his heart rules his interaction with the children. In saving Jem and Scout from Bob Ewell, Boo proves the ultimate symbol of good.
Again, in chapter three, we see the theme of how people in Maycomb are educated. We learn how Maycomb society works. After Scout fights with Walter, Jem makes peace by inviting Walter home to eat lunch. When Scout ridicules the way Walter eats his lunch, Calpurnia teaches Scout to respect people and their differences. The theme of prejudice versus tolerance is evident when Calpurnia disciplines Scout for ridiculing Walter Cunningham for pouring syrup all over his food. Calpurnia teaches Scout a lesson in respecting all people, no matter how different they may be, definitely a theme in chapter three. Scout definitely learns valuable lessons on her first day of school. In fact, she learns more than she had anticipated, especially since Scout felt she already knew so much.