"They just sit in a ghostly cave on a dark mountain after their meals. They call this practice "silent illumination", "dying the great death", "the state before the birth of one's parents." They sit there until calluses appear on their bottoms, yet they still do not dare to move."
Nowhere in doctrine of all the T'ang masters have I been able to find any instructions in or recommendation of the type of za-zen which is today the principle occupation of Zen monks. On the contrary, the practice is discussed time after time in the apparently negative fashion