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 Peacemakers alleys." As a leader of Socially Engaged Buddhism, the Zen Peacemakers publish "Bearing Witness", a free monthly online newsletter. The socially engaged practices of Zen Peacemakers is aimed at extending Dharma beyond the meditation hall to the worlds of business, social services, conflict resolution and environmental stewardship. Socially Engaged Buddhism has frequently led to new models of practice, allowing Buddhists to addressing the needs of individuals and communities in disadvantaged areas. The Zen Peacemakers' way is intended to "illuminate all life as a boundless meditation hall". Religious historian Richard Hughes Seager writes "The Zen Peacemaker Order ... has the potential