In Jonathan Lethem's novel "Chronic City," the theme of invisibility is explored through the idea that those who are often overlooked can suddenly become visible through a shift in perception. The quote emphasizes that people or issues that seem absent or ignored can reveal themselves unexpectedly, changing the way we understand our environment and each other.

This revelation challenges the reader to consider how societal factors contribute to the marginalization of certain individuals or topics. Lethem invites us to question our own awareness and the circumstances that allow some aspects of our existence to remain hidden until they are addressed or acknowledged.