‘A monk asked Zen master Yunju Daoying, “What is the one Dharma?”
Yunju said, “What are the ten thousand dharmas?”
The monk said, “I don’t understand how to comprehend this.”
Yunju said, “The one Dharma is your own mind. The ten thousand dharmas are your fundamental nature. Are they one thing or two?”
The monk bowed.’ (Zen’s Chinese Heritage)
It is to be hoped that the monk was being facetious when he said he didn’t know how to comprehend this. Still, worth pondering: one thing or two? Answer, quickly!