
During the Meiji era, a university professor went to visit the Zen master Nan-in to inquire about Zen. As Nan-in served tea, he poured his visitor's cup full, and then kept on pouring. The professor watched the tea spill over the rim and spread across the table until he could no longer restrain himself. 'It is overfull. No more will go in!' he exclaimed. Nan-in stopped pouring and looked at the man. '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?'
To acquire new knowledge and wisdom, one must first let go of preconceived notions and approach learning with an open mind.
The moral is that an overfilled mind, cluttered with biases and ego, has no room for new wisdom. One must practice humility and openness to truly learn anything meaningful.
The overflowing tea represents the professor's own opinions, theories, and ego. Just as the cup cannot hold more tea, his mind cannot receive Zen teachings because it is already full of itself.
Nan-in (1868–1912) was a Japanese Zen master during the Meiji era. He was known for his sharp wit and his ability to use everyday situations to teach profound spiritual truths.
This story illustrates 'Shoshin' or Beginner's Mind. It refers to having an attitude of openness, eagerness, and lack of preconceptions when studying a subject, even at an advanced level.
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