Yoda

An old Jedi Master. Yoda has train many Jedi in his life time, nearly 900 years old. He sits at the head of the Jedi Council, and advises against the training of Anakin. He claims that he is to old and that there is much fear in him. "Fear is the path to the dark side, fear leads to hate, hate leads to anger, and anger leads to suffering".

To be a Jedi "You must unlearn what you have learned". This is how Yoda teaches his apprentices. They must not try anything "No! Try not. Do. Or do not. There is no try".