In "A Short History of Nearly Everything," Bill Bryson explores the vastness of the universe, suggesting that its extent is limited to the distance light has traveled since the beginning of time. This perspective highlights how our understanding of the cosmos is shaped by the observable realm, which only represents a fraction of the larger universe.

This quote reflects the concept that our universe is defined by the reach of light over billions of years, emphasizing humanity's position within an ever-expanding framework that is still largely unknown. By grounding the discussion in scientific methods and discoveries, Bryson invites readers to consider both the wonders and limitations of our cosmic knowledge.