During the “sesshin,” they have besides lectures what is known as “sanzen.”[f147][7.29] To do “sanzen” is to go to the master and present one’s views on a kō-an for his critical examination. In those days when a special “sesshin” is not going on, “sanzen” will probably take place twice a day, but during the period of thought-collection—which is the meaning of “sesshin”—the monk has to see the master four or five times a day. This seeing the master does not take place openly,[f148] the monk is required to come up individually to the master’s room, where the interview goes on in a most formal and solemn manner. When the monk is about to cross the threshold of the master’s room, he makes three bows prostrating himself on the floor. He now enters the room keeping his hands folded, palm to palm, before the chest, and when he comes near the master, he sits down and makes another bow. Once in the room, all worldly convention is disregarded. If absolutely necessary from the Zen point of view, blows may be exchanged. To make manifest the truth of Zen with all sincerity of heart is the sole consideration here, and everything else receives only a subordinate attention. Hence this elaborate formalism. The presentation over, the monk retires in the same way as before. One “sanzen” for over thirty monks will occupy more than one hour and a half, and this is the time of the utmost tension for the master, too. To have this four or five times a day must be a kind of ordeal for the master himself, if he is not of robust health. An absolute confidence is placed in the master as far as his understanding of Zen goes. But if the monk has sufficient reason to doubt the master’s ability, he may settle it personally with him at the time of sanzen. This presentation of views, therefore, is no idle play for either of the parties concerned. It is indeed a most serious affair, and because it is so the discipline of Zen has a great moral value outside its philosophy. How serious this is, may be guessed from the famous interview between the venerable Shōju[7.30] and Hakuin, father of modern Zen in Japan. One summer evening when Hakuin presented his view to the old master who was cooling himself on the veranda, the master said, “Stuff and nonsense.” Hakuin echoed this loudly and rather satirically, “Stuff and nonsense!” Thereupon the master seized him, boxed him several times, and finally pushed him off the veranda. It was soon after the rainy weather, and poor Hakuin rolled in the mud and water. Having recovered himself after a while, he came up and reverentially bowed to the teacher, who then remarked again, “O you, denizen of the dark cavern!”