'Godard was not satisfied with his own ideas and he said, "Fritz, do you have any ideas how we can end this picture?" I had written something that I had never used, so I said, "How would it be if [I say], 'Murder - killing - is no solution.'" And he loved it. That's how we worked - and it was really very pleasant. I think he is the greatest hope for motion pictures.'
Fritz Lang in conversation with Peter Bogdanovich, on Godard and the making of 'Contempt'