The way The "goal" Background Chinese texts Classical Post-classical Contemporary Zen in Japan Seon in Korea Thiền in Vietnam Western Zen The Zuòchán Yí or Principles of Zazen (Chinese: 坐禅仪), is a short Chan Buddhist meditation manual attributed to a monk named Changlu Zongze (flourished c. turn of the 12th century) during the Northern Song dynasty (CE 960 - 1126) which exemplifies the practice of seated meditation which aims at "sudden" enlightenment.
[1] In writing the Principles, Tsung-tse was influenced by the works of the Tiantai meditation master Zhiyi as well as by the Cultivation and Realization According to the Sutra of Perfect Enlightenment by Guifeng Zongmi (780-841).
The Principles actually quotes large parts of Zhiyi's introduction to meditation, the Xiao Zhi Guan, showing the extent of the Tiantai influence on Chinese Chan.
Tsung-tse uses a well known metaphor to describe how practicing his kind of samadhi will lead the discovery of inherent wisdom already present in the mind: To seek the pearl, we should still the waves; if we disturb the water, it will be hard to get.
It was included in the popular Japanese Zen anthology, the Shibu roku ("Fourfold Record"), was quoted by Eisai in the Kazen gokoku ron and used by Dogen in his writing of the Fukanzazengi (Universal Promotion of the Principles of Meditation, CE 1233).