Chapter 14 has a lot to do with relationships, and what the characters think of each other. It deals with Calpurnia's relationship with the family, Scout's relationship with Jem, Scout's relationship with Atticus and Calpurnia, and Dill's relationship with his family.
When Aunt Alexandra wants to get rid of Calpurnia because she thinks it is not good for Scout to go to Calpurnia's home, Atticus tells her,
"Alexandra, Calpurnia's not leaving this house until she wants to. You may think otherwise, but I couldn't have got along without her all these years. She's a faithful member of this family and you'll simply have to accept things the way they are." (pg 137)
He also explains to her,
"....I don't think the children've suffered one bit from her having brought them up. If anything, she's been harder on them in some ways then a mother would have been...she'd never let them get away with anything, she's never indulged them the way most colored nurses do. She tried to bring them up according to her lights, and Cal's lights are pretty good ---- and another thing, the children love her." (pg 137)
When Scout and Jem have a fight, Scout gets philosophical and tells the readers that,
"His maddening superiority was unbearable these days. he didn't want to do anything but read and go off by himself. Still, everything he read he passed along to me,but with this difference: formerly, because he thought I'd like it; now, for my edification and instruction. (pg 138)
When Dill shows up after having run away from home, Scout thinks of her relationship with Atticus and Calpurnia. She thinks,
".....what I would do if Atticus did not feel the necessity of my presence, help, and advice. Why, he couldn't get along a day without me. Even Callpurnia couldn't get along unless I was there. They needed me." (pg 143)
Dill tells Scout of his relationship with his parents, and the reason he ran away.
"....they do get on a lot better without me. I can't help them any. They ain't mean. They buy me everything I want, but it's now-you've-got-it-go-play-with-it. "
Finally, Scout explains Dill to the reader. She says,
"Beautiful things floated around in his dreamy head. He could read two books to my one,but he preferred the magic of his own inventions. He could add and subtract faster than lightning,but he preferred his own twilight world, a world where babies slept, waiting to be gathered like morning lilies." (pg 144)
The page numbers are from my edition of the book, but they should be close to the same page.