Dhyāna in Buddhism "silent illumination." This became the source of some differences in practice between the Línjì and Cáodòng schools. A kōan, literally "public case", is a story or dialogue, describing an interaction between a Zen master and a student. These anecdotes give a demonstration of the master's insight. Koans emphasize the non-conceptional insight that the Buddhist teachings are pointing to. Koans can be used to provoke the "great doubt", and test a student's progress in Zen practice. Kōan-inquiry may be practiced during zazen (sitting meditation), kinhin (walking meditation), and throughout all the activities of daily life. Kōan practice is particularly emphasized by
Zen lineage charts interest from beat poets such as Jack Kerouac, Allen Ginsberg and Gary Snyder. The most successful implementation of Zen-practice was brought about by Shunryu Suzuki, Hakuun Yasutani, and Yasutani's student Taizan Maezumi. Shunryu Suzuki (鈴木 俊隆 "Suzuki Shunryū", dharma name "Shōgaku Shunryū" 祥岳俊隆, often called Suzuki Roshi) (born May 18, 1904, Kanagawa Prefecture of Japan; died December 4, 1971 in San Francisco, CA, USA) was a Sōtō Zen monk and teacher who helped popularize Zen Buddhism in the United States, and is renowned for founding the first Buddhist monastery outside Asia (Tassajara Zen Mountain Center). Suzuki founded San Francisco Zen