Zen Master Hsueh-feng
encountered a monk and asked him where he had come from. The monk said, “From the Monastery of
Spiritual Light.”
"Oh, I see" said the Zen Master.
The Master then said, “In the
daytime, we have sunlight; in the evening, we have lamplight. What is spiritual
light?”
The monk could not
answer.
The Master said, “Sunlight.
Lamplight.”