The traditional origin of Zen in India before its introduction into China, which is recorded in Zen literature, is so mixed with legends that no reliable facts can be gathered from it. In the days when there was yet no critical study of anything and when things, especially relating to religion, were believed in a wholesale manner, we could not expect anything else. It may now be too late to try to unravel the mysteries enveloping the origin of Zen in India except in a general and logical way from the historical facts already known concerning the development of Mahayana Buddhism. In fact, Zen Buddhism, as was already discussed, is the product of the Chinese mind, or rather the Chinese elaboration of the Doctrine of Enlightenment. Therefore, when we want to narrate the history of Zen, it may be better in some respects not to go to India, but to stay in China and study the psychology and philosophy of her people and the surrounding conditions that made it possible for Zen to achieve a successful growth in the land of the celestials, always remembering that it is a practical interpretation of the Doctrine of Enlightenment. Some scholars may however object to this kind of treatment of the subject, on the ground that if Zen is at all a form of Buddhism or even the essence of it as is claimed by its followers, it cannot be separated from the general history of Buddhism in India. This is quite true, but as far as facts are concerned, Zen as such did not exist in India, that is, in the form as we have it to-day; and therefore when we try to go beyond China to trace its origin and development, the only way open to us will be the one I have followed in my previous Essays collected here. That is to say, we must consider Zen the Chinese interpretation of the Doctrine of Enlightenment, which is expounded in all Buddhist literature, most intensively in the Mahayana and more or less provisionarily in the Hinayana. As time went on, this doctrine steadily grew to occupy the minds of the Buddha’s followers and to control the course of development of Buddhist thought generally; for was it not through Enlightenment that Gautama became the Buddha, the Enlightened One? and is it not the object of Buddhism to follow the footsteps of its founder in the attainment of final emancipation? But the Chinese adherents of Bodhism[f77] or the upholders of Enlightenment did not wish to swallow Indian Buddhism undigested. The practical imagination of the Chinese people came thus to create Zen, and developed it to the best of their abilities to suit their own religious requirements.