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. The violence seemed to work both ways, for the monks often gave him a dose of his own medicine. An example is reported in the following story: _It happened once that his disciple Yin-feng was pushing along a cart, while Ma-tsu was sitting on the road with his feet stretched out. Yin- feng requested him to draw back his feet, but Ma-tsu said, "What is stretched out is not to be drawn back again!" Yin-feng retorted, "Once advanced, there is no turning backward!'' Disregarding the master, he kept pushing the cart until it ran over and injured his feet. Ma-tsu returned to the hall with an axe in his hand, saying, "Let the one who a few moments ago injured my feet with his cart come forward!" Yin- feng, not to be daunted, came forward stretching his neck in front of the master. The master [peacefully] put down his axe.20 _ The significance of this story, if it has any significance, is that it conveys the atmosphere of Ch'an monasteries around 750. It demonstrates that the leader of a monastery had to win his spurs. He had to be tougher, more audacious, and faster than anybody else. During the T'ang it was common to use the ox as a metaphor for all that is uncontrollable in human nature. The ox was not necessarily bad; it just had to be governed. The rigor with which this control was applied at Ma-tsu's monastery is illustrated in the story concerning one of the disciples, a former hunter who Ma-tsu encountered one day working in the monastery kitchen. "What are you doing?" asked the master--a question that never got a straight answer from an enlightened Ch'an monk.