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...
When rulers take grain so that they may feast,
Their people become hungry;
When rulers take action to serve their own interests,
Their people become rebellious;
When rulers take lives so that their own lives are maintained,
Their people no longer fear death.