"You must un-learn what you have learned!" All were great but that was favorite one. Classic Zen Master and Learned University Professor Tea Cup story of close-mindedness... "Like this cup, you are full of your own opinions and speculations. If you do not first empty your cup, how can you taste my cup of tea?" the lesson---is your cup half empty or half full? Sifu Bruce Lee said "Open your mind. Be formless, shapeless..."