Empty Your Cup
Nan-in, a Japanese master during the Meiji era (1868-1912), received a university professor who came to inquire about Zen. While the master quietly served tea, the professor talked about Zen.
The master poured the visitor’s cup to the brim, and then kept pouring. The professor watched the overflowing cup until he could no longer restrain himself. "It is overfull. No more will go in!"
"Like this cup," Nan-in said, "you are full of your own opinions and speculations. How can I show you Zen unless you first empty your cup?"