A university professor came to a Japanese master to Question About Zen. Japanese master greeted him. Before they could start to talk about Zen Japanese master invited professor for tea.
At the table both were sitting in front of each other. Master started to serve tea for professor while pouring tea for professor master poured his cup full and even then he kept on pouring in that cup.
For sometime professor kept watching the overflow but after some time he couldn’t restrain himself for saying, It’s full. No more will go in.
Just like this cup! You are full of your own opinion and speculation. How can i show you Zen unless you first empty your cup said Japanese master.