In "The Hound of the Baskervilles" by Arthur Conan Doyle, the quote highlights the idea that evil can manifest through ordinary people. It suggests that malevolent forces may not always be supernatural but can instead take the form of individuals who choose to commit wrongdoing. This notion invites readers to consider the duality of human nature, where both good and evil coexist within society.

This perspective adds depth to the narrative, as it challenges the characters and readers to look beyond the obvious and confront the complexities of morality. By asserting that the devil's agents can be human, the story encourages an exploration of motive and intention, emphasizing that darkness can reside in unexpected places.