A great Japanese master received a university
professor who came to enquire about wisdom. The master served tea. He poured
his visitor's cup full, and then kept on pouring. The professor watched the
overflow until he could no longer restrain himself. 'It is overfull. No more
will go in!' 'Like this cup,' the master said, 'you are full of your own
opinions and speculations. How can I show you wisdom unless you first empty
your cup?'