In To Kill a Mockingbird, Atticus sees his daughter Scout maturing from childhood innocence to adulthood. Here are a couple of quotes, though my page numbers are different from yours. So, I've included chapters.
So it took an eight-year-old child to bring 'em to their senses.... That proves something - that a gang of wild animals can be stopped, simply because they're still human. Hmp, maybe we need a police force of children. (Chapter 16)
Atticus also says, which Scout overhears and commits to memory:
They're certainly entitled to think that, and they're entitled to full respect for their opinions... but before I can live with other folks I've got to live with myself. The one thing that doesn't abide by majority rule is a person's conscience. (Chapter 11)
So, by witnessing the words and actions of her father Scout is able to mature on her own, so when he is not present, she can defend herself alone. In the quote below, Scout synthesizes what she has learned thus far (especially from the trial) in a discussion with Aunt Alexandra's hypocritical and judgmental Missionary Society.
I think there's just one kind of folks. Folks. (Chapter 23)
As simple as this sounds, Scout's quote is very mature. She has refused to classify or segregate people or to focus on their differences, which is what her Aunt and most of Maycomb have done throughout the novel. Instead, she sees the common goodwill of people, the things that bring them together, that make them alike.