Empire Strikes Back
Foun 097 - 49
Yoda: A Jedi must have the deepest commitment, the most serioius mind....So certain are you. Always with you it cannot be done. Hear you nothing that I say?
Luke: Master, moving stones around is one thing . This is totally different.
Yoda: No! No different! Onl different in your mind. You must unlearn what you have learned. ESB V