My dad's been responsible for a lot of my issues.
I think in terms of chapters. Every time I finish a movie, it's a chapter. When one of my kids graduates from school, that's a chapter.
I think that a movie can only be an adjunct or only a supplement to books, to different points of view, to scholars, historians and your own teachers.
I think every movie I've made after 'Indiana Jones,' I've tried to make every single movie as if it was made by a different director, because I'm very conscious of not wanting to impose a consistent style on subject matter that is not necessarily suited to that style. So I try to re-invent my own eye every time I tackle a new subject.