The quote "A man's library opens up his character to the world" from Matthew Pearl's novel, The Last Bookaneer, suggests that a person's collection of books reflects their identity and values. The library serves as a window through which others can perceive the owner's interests, knowledge, and personality. It highlights the idea that literature and the choices we make in what we read can reveal much about who we are.

This perspective emphasizes the significance of libraries and reading in shaping and expressing one's character. A well-curated library not only represents individual tastes but also serves as a testament to one's intellectual pursuits and inspirations. Through the books we choose, we invite others to understand and engage with our inner world.