Kuei-shan asked Yun-yen 
“What is the seat of enlightenment?”
Yun-yen said,
“Freedom from artificiality.”

Guishan Lingyou (771-854), Guishan Lingyou or Master Lingyou of Guishan was a Chinese Zen Master during Tang Dynasty, secular born in Changxi, Fujian province, the founding person of the Guiyang school.