In the book "The Fortress of Solitude" by Jonathan Lethem, the quote reflects the protagonist's struggle with identity and self-perception. He feels that he has lost touch with his once cherished role as a superhero, which he now considers to be overwhelmingly sad and ineffective. Instead, he has adopted a more mundane identity, embracing the lifestyle and culture of California, suggesting a shift from aspiration to acceptance of a more ordinary existence.

This transformation symbolizes a broader theme in the narrative, exploring how personal and cultural identities evolve over time. The contrast between the idealized notion of being a superhero and the reality of life in California highlights the complexities of growing up, confronting disillusionment, and seeking belonging in a changing environment.