The foregoing sketch of Zen I hope will give the reader a general, though necessarily vague, idea of Zen as it is and has been taught in the Far East for more than one thousand years. In what follows I will try first to seek the origin of Zen in the spiritual enlightenment itself of the Buddha; for Zen has been frequently criticised for deviating too far from what is popularly understood to be the teaching of the Buddha as it is recorded especially in the Āgamas or Nikāyas. While Zen, as it is, is no doubt the native product of the Chinese mind, the line of its development must be traced back to the personal experience of the Indian founder himself. Unless this is understood in connection with the psychological characteristics of the people, the growth of Zen among the Chinese Buddhists would be unintelligible. Zen is after all one of the Mahayana schools of Buddhism shorn of its Indian garb. Next I have tried to write a history of Zen in China after Bodhi-Dharma, who is the real author of the school. Zen was quietly matured and transmitted by the five successive patriarchs so-called after the passing of the first propagator from India. When Hui-nêng, the sixth patriarch, began to teach the gospel of Zen Buddhism, it was no more Indian but thoroughly Chinese, and what we call Zen now in the form as we have it, dates from him. The course thus definitely given shape by the sixth patriarch to the development of Zen in China gained its strength not only in volume but in content by the masterful handling of it by the spiritual descendants of Hui-nêng. The first section of the Chinese history of Zen therefore naturally closes with him. As the central fact of Zen lies in the attainment of “satori” or the opening of a spiritual eye, I have next dwelt upon the subject. The treatment is somewhat popular, for the main idea is to present the fact that there is such a thing as an intuitional understanding of the truth of Zen, which is “satori,” and also to illustrate the uniqueness of “satori” as experienced by Zen devotees. When we understand the significance of “satori” in Zen, we may logically wish to know something about the methods whereby the masters contrive to bring about such a revolutionary experience, more or less noetic, in the minds of the students. Some of the practical Zen methods resorted to by the masters are classified under a certain number of headings, but in this classification I have not attempted to be thoroughly exhaustive here. The Meditation Hall is an institution quite peculiar to Zen Buddhism, and those who want to know something about Zen and its educational system cannot afford to ignore the subject. This unique organ of Zen Buddhism however has never been described before. The reader I hope will find here a subject interesting enough for his thorough investigation. While Zen claims to be the “ultra-abrupt” wing of Buddhism, it has a well-marked gradation in its progress towards the ultimate goal.