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
Katsu (Zen) Katsu (Zen) Katsu (Japanese: 喝; Cantonese: "", Pinyin: "hè", Wade-Giles: "ho") is a shout that is described in Chán and Zen Buddhism encounter-stories, to expose the enlightened state (Japanese: "satori") of the Zen-master, and/or to induce initial enlightenment experience in a student. The shout is also sometimes used in the East Asian martial arts for a variety of purposes; in this context, "katsu" is very similar to the shout "kiai". The word in Chinese means literally "to yell" or "to shout". In Japanese it has also developed the meaning of "to browbeat", "to scold", and "hoarse". In the context of