If we think of the unconditioned Mind of the Buddha to be like an unbounded field, and our own mind, together with its thoughts, to consist of extended disturbances in this unbounded field which hides this field, how does one come to see, directly, this unbounded field?
This for me illustrates the difficulty of koans insofar as they are assumed to be skillful means for helping us to realize, face to face, this unbounded field. Oddly, they all confront us with a verbal disturbance like “mu” (C., wu) which we can’t seem to push out of the way this being what Mumon calls the “barrier” or “checkpoint” 慧 which will only permit the unconditioned to enter the “no-gate” 無門, but not the conditioned.
Examining the problem a little further, our Buddha-nature, as a matter of faith on our part, doesn’t have this disturbance. It is unconditioned. But here is the problem: we have never seen our Buddha-nature which is what we are trying to accomplish with koans! One more thing. This verbal disturbance disappears into what? We can only follow the disturbance to a certain point. We have no direct intuition of the unbounded field into which it vanishes.
All that we can think of saying is that from this field, a verbal disturbance arises then disappears only to arise again. We don’t seem to have any actual ability to follow the verbal disturbance to where it disappears—to enter this unbounded field which is the Buddha-nature. We are only aware of more disturbances arising from this unbounded field as we speculate.
In my own example, I took a slightly different strategy. I looked within for “pure Mind” knowing fully well that the verbal concept “pure Mind” was just a name or signifier for the actual unbounded field. I was in the right spot but I was still disturbing the field unable to locate this pure Mind (another name for this field besides Buddha-nature). It was only when I had thoroughly exhausted my strategies and I was empty of presuppositions was I able to enter. Short of this my volition was at work trying to posit what I thought was this pure Mind. With satori, this positing process suddenly stops but also we merge into the unbounded field in which things have not arisen. Here is when we see the Buddha-nature or the Mind of the Buddha.