This quote from David Mitchell's "The Bone Clocks" emphasizes the idea that narratives and identities must be fully formed rather than incomplete or ambiguous. Just as pregnancy is a distinct state, a book's genre should be definitive, either wholly fantasy or not. This statement provokes thought about the boundaries of literary classifications and challenges the notion of mixing genres without a clear purpose.

Furthermore, by drawing a parallel between literature and human experiences, the quote illustrates the importance of authenticity in storytelling. It suggests that both books and people should embrace their complete identities. This perspective can encourage readers and writers alike to seek depth and clarity in their narratives, leading to more engaging and meaningful works.