"Judgement", as a general concept, keeps popping up in my recent meanderings--particularly in reference to how judgement blocks understanding. I think this koan sums it up pretty well.
Nan-in, a Japanese master, received a university professor who came to inquire about Zen.
Nan-in served tea. He poured his visitor's cup full, and then kept on pouring.
The professor watched the overflow until he no longer could 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 you learn unless you first empty your cup?"