"There's no point in making a film out of a great book. The book's already great. What's the point?"

This quote by Neil Jordan recommends that there is no need to make a movie adaptation of a fantastic book, as the book is currently great. He indicates that the movie adaptation would not be able to catch the exact same level of greatness as the book, and therefore it would be meaningless to make the film. Jordan is recommending that the movie adaptation would not be able to justify the book, which it would be a wild-goose chase and resources to make the film. He is also implying that the movie adaptation would not have the ability to capture the same level of feeling and depth as the book, which it would be a disservice to the original work. Jordan's quote is a tip that books and movies are two various mediums, and that it is essential to appreciate the initial work and not try to recreate it in a different type.