This exchange brings out the essence of Huang-po's concerns. His most insistent conviction was that Ch'an cannot be taught, that it must be somehow gained intuitively. He was contemptuous of conceptual thought, believing it to be the greatest hindrance to achieving intuitive insight. The problem is the mistaken belief that Zen can somehow be taught and understood if only one grasps the concepts. But concepts only serve to obstruct intuition; Zen intuition can work only outside concepts. As Huang-po phrased it:
Since Zen was first transmitted, it has never taught that men should seek for learning or form concepts. "Studying the Way" is just a figure of speech. It is a method of arousing people's interest in the early stages of their development. In fact, the Way is not something which can be studied. Study leads to the retention of concepts and so the Way is entirely misunderstood.15
The use of the rational mind in the study of Ch'an is only meaningful at the beginning. But once the fish of intuitive insight has been snared in the net of the rational mind's ken, the net must be discarded. Elsewhere he likens the extended use of analytical thought to the shoveling of dung.16 Concepts, it turns out, are only one of the mind's many constructs. The mind also provides our perception of concrete objects, thereby "creating" them to suit its needs.
Hills are hills. Water is water. Monks are monks. Laymen are laymen. But these mountains, these rivers, the whole world itself, together with the sun, moon, and stars—not one of them exists outside your minds! . . . Phenomena do not arise independently, but rely upon (the mental) environment (we create).17
Since reality is created by the mind, we will never know what is "real" and what is illusion. Examples of this are commonplace. The electron is both a wave and a particle, depending upon our point of view. Which is "reality"? Furthermore, concepts limit. By treating the world using rational constructs, we force it into a limited cage. But when we deal with it directly, it is much more complex and authentic. To continue the example, the electron may be something much more complex than either a wave or a particle, since it behaves at times like either or both. It may in fact be something for which our rationality-bound mind has no "concept."
The illusory world we think we see around us, deceptively brought to us by our untrustworthy senses, leads us to conceptual thought and to logical categories as a means to attempt its "understanding." The resulting intellectual turmoil is just the opposite of the tranquility that is Ch'an. But avoidance of conceptual thought leads to a serene, direct, and meaningful understanding of the world around us, without unsettling mental involvement.
Ordinary people all indulge in conceptual thought based on environmental phenomena, hence they feel desire and hatred. To eliminate environmental phenomena, just put an end to your conceptual thinking. When this ceases, environmental phenomena are void; and when these are void, thought ceases. But if you try to eliminate environment without first putting a stop to conceptual thought, you will not succeed, but merely increase its power to disturb you.18
What is worse, reliance on misleading perception blocks out our experience of our own pure mind.
People in the world cannot identify their own mind. They believe that what they see, or hear, or feel, or know, is mind. They are blocked by the visual, the auditory, the tactile, and the mental, so they cannot see the brilliant spirit of their original mind.19