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
History of Buddhism in India the founder of Zen Buddhism in China. In 580, Indian monk Vinītaruci travelled to Vietnam. This, then, would be the first appearance of Vietnamese Zen, or Thien Buddhism. Padmasambhava, in Sanskrit meaning ""lotus-born"", is said to have brought Tantric Buddhism to Tibet in the 8th century. In Bhutan and Tibet he is better known as "Guru Rinpoche" (""Precious Master"") where followers of the Nyingma school regard him as the second Buddha. Śāntarakṣita, abbot of Nālanda and founder of the Yogacara-Madhyamaka is said to have helped Padmasambhava establish Buddhism in Tibet. Indian monk Atiśa, holder of the "mind training" (Tib. lojong)