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 instead of the insight into and certainty about the way to follow to reach enlightenment. However, in some Zen traditions this perfection came to be relativized again; according to one contemporary Zen master, "Shakyamuni buddha and Bodhidharma are still practicing." Mahayana discerns three forms of awakened beings: Within the various Mahayana-schools exist various further explanations and interpretations. In Mahāyāna Buddhism the Bodhisattva is the ideal. The ultimate goal is not only of one's own liberation in Buddhahood, but the liberation of all living beings. But Mahayana Buddhism also developed a cosmology with a wide range of buddhas and bodhisattvas, who