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 center Zen center The phrase Zen center was coined by American students of Shunryu Suzuki in the mid-twentieth century, and the San Francisco Zen Center became the first Zen center, incorporating in 1962. Neither temples nor monasteries (although at times operating such facilities), Zen centers occupy a unique place in the historical development of Zen Buddhism and of Buddhism in the United States. As Zen practice has expanded throughout the United States over the last fifty years, the variety of Zen centers has increased. While some are now the homes of wealthy communities in major cities (such as Zen Center of