Caodong

Chan

Caodong

Branch of Qingyuan line

The Caodong school (曹洞宗) is one of the Five Houses of Chan, founded in the ninth century by Dongshan Liangjie and his student Caoshan Benji—the school's name combines the first characters of their mountain names. Its central philosophical contribution is the Five Ranks (wuwei), a dialectical framework describing five modes of relationship between the absolute (emptiness) and the relative (form). Where the Linji school emphasized dramatic breakthrough through shouts and blows, the Caodong tradition developed a subtler approach centered on 'silent illumination' (mozhao chan)—objectless sitting in which awareness naturally illuminates itself without the pursuit of any particular experience. Hongzhi Zhengjue, the Song dynasty master at Tiantong Monastery, was the school's greatest literary voice, composing the verses for the Book of Serenity and articulating silent illumination as a formal practice. The Caodong school nearly went extinct during the Song dynasty before being revived through the extraordinary cross-lineage transmission from Dayang Jingxuan through the Linji master Fushan Fayuan to Touzi Yiqing. Through Furong Daokai and subsequent masters, the revived Caodong tradition reached Tiantong Rujing, who transmitted it to Dogen and thus to all of Japanese Soto Zen.