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
Enlightenment in Buddhism "anicca", "dukkha" and "anatta". Insight leads to the four stages of enlightenment and Nirvana. In Mahayana Buddhism Prajna (Sanskrit) means "insight" or "wisdom", and entails insight into "sunyata". The attainment of this insight is often seen as the attainment of "enlightenment". "Kensho" and "Satori" are Japanese terms used in Zen traditions. "Kensho" means "seeing into one's true nature." "Ken" means "seeing", "sho" means "nature", "essence", c.q Buddha-nature. "Satori" (Japanese) is often used interchangeably with kensho, but refers to the "experience" of kensho. The Rinzai tradition sees "kensho" as essential to the attainment of Buddhahood, but considers further practice essential to