In any captivating fairy tale, the presence of a classic villain is essential for creating conflict and tension. Characters that embody evil or malice often serve to challenge the hero, making the journey more exciting and the eventual triumph more satisfying. Sir Arthur Conan Doyle’s work, "The Adventures of Sherlock Holmes," showcases the significance of such antagonists, reflecting a familiar trope in storytelling that has stood the test of time.

Villains enhance the narrative by providing obstacles that protagonists must overcome, which in turn drives character development. This timeless concept extends beyond fairy tales into various forms of literature, including detective stories, where the battle between good and evil is vividly portrayed. The quote highlights how critical a well-crafted villain is in engaging readers and enriching the overall story.