The Way of Zen - Alan Watts [69]
The proper adjustment of a feed-back system is always a complex mechanical problem. For the original machine, say, the furnace, is adjusted by the feed-back system, but this system in turn needs adjustment. Therefore to make a mechanical system more and more automatic will require the use of a series of feed-back systems–a second to correct the first, a third to correct the second, and so on. But there are obvious limits to such a series, for beyond a certain point the mechanism will be “frustrated” by its own complexity. For example, it might take so long for the information to pass through the series of control systems that it would arrive at the original machine too late to be useful. Similarly, when human beings think too carefully and minutely about an action to be taken, they cannot make up their minds in time to act. In other words, one cannot correct one’s means of self-correction indefinitely. There must soon be a source of information at the end of the line which is the final authority. Failure to trust its authority will make it impossible to act, and the system will be paralyzed.
The system can be paralyzed in yet another way. Every feedback system needs a margin of “lag” or error. If we try to make a thermostat absolutely accurate–that is, if we bring the upper and lower limits of temperature very close together in an attempt to hold the temperature at a constant 70 degrees–the whole system will break down. For to the extent that the upper and lower limits coincide, the signals for switching off and switching on will coincide! If 70 degrees is both the lower and upper limit the “go” sign will also be the “stop” sign; “yes” will imply “no” and “no” will imply “yes.” Whereupon the mechanism will start “trembling,” going on and off, on and off, until it shakes itself to pieces. The system is too sensitive and shows symptoms which are startlingly like human anxiety. For when a human being is so self-conscious, so self-controlled that he cannot let go of himself, he dithers or wobbles between opposites. This is precisely what is meant in Zen by going round and round on “the wheel of birth-and-death,” for the Buddhist samsara is the prototype of all vicious circles.3
Now human life consists primarily and originally in action–in living in the concrete world of “suchness.” But we have the power to control action by reflection, that is, by thinking, by comparing the actual world with memories or “reflections.” Memories are organized in terms of more or less abstract images–words, signs, simplified shapes, and other symbols which can be reviewed very rapidly one after another. From such memories, reflections, and symbols the mind constructs its idea of itself. This corresponds to the thermostat–the source of information about its own past action by which the system corrects itself. The mind-body must, of course, trust that information in order to act, for paralysis will soon result from trying to remember whether we have remembered everything accurately.
But to keep up the supply of information in the memory, the mind-body must continue to act “on its own.” It must not cling too closely to its own record. There must be a “lag” or distance between the source of information and the source of action. This does not mean that the source of action must hesitate before it accepts the information. It means that it must not identify itself with the source of information. We saw that when the furnace responds too closely to the thermostat, it cannot go ahead without also trying to stop, or stop without also trying to go ahead. This is just what happens to the human being, to the mind, when the desire for certainty and security prompts identification between the mind and its own image of itself. It cannot let go of itself. It feels that it should not do what it is doing, and that it should do what it is not doing. It feels that it should not be what it is, and be what it isn’t. Furthermore, the effort to remain always “good” or “happy” is like trying to hold the thermostat to a constant 70 degrees by making the lower limit the