It is said that a Zen Monk sat below a Pattra Tree and came to the realization of this Internal Skill. When the skill was developed, the monk etched the incantation on a Palm-Leaf. It was thus transmitted into the world and called the "Palm-Leaf Sutra". There is a saying: Bodhi tree to talk about mysterious, Bayece by the edge into the set; internal work out of Zen door, release the road of life and death, Road, the meaning of Zen, practice to Dacheng, static as dead wood, no life without death, crossing the enemy in the invisible.