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
Aeon Zen operatic power metal style singing, all the way to death metal growling. Nothing is out of the question." However, even those critics who believed the band were yet to find their "musical identity", praised the album as a bold statement of intent, particularly given the young age of the musicians. Aeon Zen Aeon Zen are a progressive metal band formed in 2008, led by founding member Rich Hinks. To date, they have been praised and heavily featured in the international music press, labelled by "Classic Rock Magazine" as 'a strong contender for best newcomer at the very, very least' and,