Before I became a film major, I was very heavily into social science, I had done a lot of sociology, anthropology, and I was playing in what I call social psychology, which is sort of an offshoot of anthropology/sociology - looking at a culture as a living organism, why it does what it does.
George LucasI felt that one of the major issues in the third film is that Luke is finally on his own and has to fight Vader and the Emperor by himself. If you get a sense that Yoda or Ben is there to help him or to somehow influence him, it diminishes the power of the scene.
George LucasYou need peers; you need people who are at the same level you are. You never know in life when you're going to need help, and you never know who you're going to need it from.
George LucasI wanted Yoda to be the traditional kind of character you find in fairy tales and mythology. And that character is usually a frog or a wizened old man on the side of the road. The hero is going down the road and meets this poor and insignificant person. The goal or lesson is for the hero to learn to respect everybody and to pay attention to the poorest person because that's where the key to his success will be.
George Lucas