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
Aniconism in Buddhism Theravada temples and other sites typically concentrate on a single large sculpture of the Buddha, whereas Mahayana temples have larger numbers of images of a greater variety of figures with varying degrees of spiritual significance. However some schools, such as Zen Buddhism in Japan, have also shown a general tendency towards aniconism, though without specific prohibition of figurative images. Aniconism in Buddhism Since the beginning of the serious study of the history of Buddhist art in the 1890s, the earliest phase, lasting until the 1st century CE, has been described as aniconic; the Buddha was only represented through symbols such