* "It's LeviOsa, not LeviosA!" (Hermione Granger, *Harry Potter and the Sorcerer's Stone*) - This humorous line highlights Hermione's intelligence and patience, and is often used to correct mispronunciations.
* "Always." (Severus Snape, *Harry Potter and the Deathly Hallows*) - This poignant line reveals the depth of Snape's love for Lily Potter, and has been a source of debate and analysis among fans.
* "You're a wizard, Harry." (Hagrid, *Harry Potter and the Sorcerer's Stone*) - This line is the catalyst for Harry's magical journey, and is often quoted as a symbol of wonder and discovery.
* "Mischief managed." (Fred and George Weasley, *Harry Potter and the Sorcerer's Stone*) - This playful line, often used by Fred and George, reflects their mischievous nature and enduring friendship.
* "There is no greater agony than bearing an untold story inside you." (Hermione Granger, *Harry Potter and the Order of the Phoenix*) - This powerful line reflects the importance of speaking out and expressing oneself, especially in the face of injustice.
Ultimately, the most famous dialogue is the one that resonates most with each individual reader or viewer, depending on their personal connection to the story and its characters.