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
Enlightenment in Buddhism Sakyamuni's Buddhahood is celebrated on Bodhi Day. In Sri Lanka and Japan different days are used for this celebration. According to the Theravada tradition in Sri Lanka, Sakyamuni reached Buddhahood at the full moon in May. This is celebrated at Wesak Poya, the full moon in May, as Sambuddhatva jayanthi (also known as Sambuddha jayanthi). According to the Zen tradition, the Buddha reached his decisive insight on 8 December. This is celebrated in Zen monasteries with a very intensive eight-day session of "Rōhatsu". Enlightenment in Buddhism The English term enlightenment is the western translation of the abstract noun bodhi, (;