The quote from Rick Riordan's "The Serpent's Shadow" reflects on the concept of a person's legacy and the influence they leave behind. It suggests that every individual has a 'shadow' representing their contributions and impact on the world, with some people making little mark, while others create a lasting presence that can resonate through time.

This analogy emphasizes the idea that our actions and choices shape how we are remembered. A profound legacy can inspire future generations, while a negligible impact may fade quickly into obscurity. It calls for introspection on how we want to be remembered and what kind of 'shadow' we choose to cast during our lives.