Nan-in, a Japanese master during the Meiji era (1868-1912), 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...
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The Way is without form or quality,
But expresses all forms and qualities;
The Way is hidden and implicate,
But expresses all of nature;
The Way is unchanging,
But expresses all motion.