I’ll never catch up.
-- Daphne (chapter 2)

Importance: When Daphne is young, she makes this statement in reference to the fact that Laurel was born 17 minutes before Daphne. Young Daphne apparently worries that this 17-minute difference will mean that Laurel will outpace her in all areas of life. This worry, while humorous, serves to establish the sense of sibling rivalry that affects the twins' relationship throughout the book.

We revolt you.”“We are revolting. Against you.
-- Laurel, Daphne (chapter 2)

Importance: The twins develop an interest in words and language at an early age, and so the novel begins to establish this dynamic early on. In the above dialogue, the twins gleefully explore the multiple meanings of the word 'revolt,' thereby demonstrating the joy and satisfaction that they gain form such play. Their interest in words and language remains consistent and fundamental for them, throughout the story.

Sally sometimes encouraged them to watch television just to get...
-- Narration (chapter 4)