Dhyāna in Buddhism the Japanese Rinzai school, but it also occurs in other schools or branches of Zen depending on the teaching line. The Zen student's mastery of a given kōan is presented to the teacher in a private interview (referred to in Japanese as "dokusan" (独参), "daisan" (代参), or "sanzen" (参禅)). While there is no unique answer to a kōan, practitioners are expected to demonstrate their understanding of the kōan and of Zen through their responses. The teacher may approve or disapprove of the answer and guide the student in the right direction. The interaction with a Zen teacher is central in
Faith in Buddhism the focus on meditation practice which was common in Zen Buddhism, Dōgen led a revival of interest in the study of the "sūtras", which he taught would inspire to a faith based on understanding. Inspired by Chinese Chan Buddhism, Dōgen was attracted to a return of the simple life as exemplified by the Buddha in the "sūtras". He further believed that sitting meditation was not only the path to enlightenment, but also a way to the Buddha nature within. The practitioner should have the faith that the Buddha nature is already within, Dōgen taught, although Dōgen did not believe this