Without the little ideas, there are no big ideas.
Scratching is what you do when you can’t wait for the thunderbolt to hit you. As Freud said, “When inspiration does not come to me, I go halfway to meet it.” How is that different from a movie producer calling up a gifted writer and prod ding him to suggest a plot line of “two men and a bear”? If you go halfway, you double your chances of getting a toehold on an idea.
Remember this when you’re struggling for a big idea. You’re much better off scratching for a small one.