As the scholar John Wu has pointed out, "This dialogue reveals an important secret about Ma-tsu's art of teaching. Sometimes he used a positive formula, sometimes he used a negative formula. On the surface they are contradictory to each other. But when we remember that he was using them in answering persons of different grades of attainments and intelligence, the contradiction disappears at once in the light of a higher unity of purpose, which was in all cases to lead the questioner to transcend his present state."15 Another example of a seemingly contradictory position is recorded as a koan in another famous collection, the Blue Cliff Record (Case 3). In this anecdote, Ma-tsu is asked one day about his health, and he responded with, "Sun-faced Buddhas, Moon-faced Buddhas."16 According to a Buddhist tradition, a Sun-faced Buddha lives for eighteen hundred years, a Moon-faced Buddha lives only a day and a night. Perhaps he was proposing these two contradictory cases to demonstrate the irrelevance of an inquiry after his physical state. It would have been far better if the question had concerned his mind.
A story describing how Ma-tsu handled other teachers who wandered by depicts very well the way that he could undermine logic and categorization. In a particularly famous anecdote, a visiting teacher proposed a condition of duality, a condition equivalent to that of a switch that can be either off or on. Having permitted the teacher to adopt this very un-Zen position, Ma-tsu proceeds to demolish him. The story goes as follows:
A monk who lectured on Buddhism came to the Master and asked, "What is the teaching advocated by the Ch'an masters?" Ma-tsu posed a counterquestion: "What teachings do you maintain?" The monk replied that he had lectured on more than twenty sutras and sastras. The Master exclaimed, "Are you not a lion?" The monk said, "I do not venture to say that." The Master puffed twice and the monk commented, "This is the way to teach Ch'an." Ma-tsu retorted, "What way do you mean?" and the monk said, "The way the lion leaves the den." The Master became silent. Immediately the monk remarked, "This is also the way of Ch'an teaching." At this the Master again asked, "What way do you mean?" "The lion remains in his den." "When there is neither going out nor remaining in, what way would you say this was?" The monk made no answer. . . .17
Ma-tsu had posed a seemingly unanswerable question, at least a question that logic could not answer. This provocative exchange, later to be known as a mondo, was a new teaching technique that departed significantly from the earlier methods of Hui-neng and Shen-hui, who mounted a platform, gave a sermon, and then politely received questions from the audience.
But how did Ma-tsu handle this question when it was presented to him? He fell back on the fact that reality is what we make it, and all things return to the mind. He once handled essentially the same question that he put to the visiting monk, showing how it can be done. His response is the essence of Zen.
A monk once drew four lines in front of Ma-tsu. The top line was long and the remaining three were short. He then demanded of the Master, "Besides saying that one line is long and the other three are short, what else could you say?" Ma-tsu drew one line on the ground and said, "This could be called either long or short. That is my answer."18
Language is deceptive. But if it is used to construct an anti-logical question, it can equally be used to construct an anti-logical reply.
Ma-tsu discovered and refined what seems to have eluded the earlier teachers such as Hui-neng and Huai-jang: namely, the trigger mechanism for sudden enlightenment. As noted earlier, he originated the use of shouting and blows to precipitate enlightenment, techniques to become celebrated in later decades in the hands of men such as Huang-po and Lin-chi, masters who shaped the Rinzai sect. As a typical example, there is the story of a monk coming to him to ask, "What was the purpose of Bodhidharma's coming from the West?" which is Ch'an parlance for "What is the basic principle of Zen?" As the monk bowed reverently before the old master waiting for the reply that would bring it all together, Ma-tsu knocked him to the ground, saying, "If I do not strike you, people all over the country will laugh at me." The hapless monk picked himself up off the ground and—suddenly realizing he had just tasted the only reality there is—was enlightened on the spot.19 Obviously, every boxer does not experience enlightenment when he receives a knockout punch. The blow of enlightenment is meant to rattle the questioning mind and to disrupt, if only for an instant, its clinging to abstractions and logic. It seems almost as though enlightenment were a physical phenomenon that sometimes can best be achieved by a physical process—such as a blow or a shout.