The line between truth and fiction is a mirage in your work.

Some of the documentaries contain fiction, and some of the fiction films contain fact. Yes, you really did haul a boat up a mountainside in “Fitzcarraldo,” even though any other director would have used a model, or special effects. You organized the ropes and pulleys and workers in the middle of the Amazonian rain forest, and hauled the boat up into the jungle. And later, when the boat seemed to be caught in a rapids that threatened its destruction, it really was. This in a fiction film. The audience will know if the shots are real, you said, and that will affect how they see the film.

I understand this. What must be true, must be true. What must not be true, can be made more true by invention. Your films, frame by frame, contain a kind of rapturous truth that transcends the factually mundane. And yet when you find something real, you show it....

You and your work are unique and invaluable, and you ennoble the cinema when so many debase it. You have the audacity to believe that if you make a film about anything that interests you, it will interest us as well. And you have proven it.

-- From an open letter from Roger Ebert to Werner Herzog.