The brain as a knot of consciousness
|A small, natural whirlpool.|
The idea that the brain does not generate consciousness, but instead limits and filters it down, seems to require dualism and contradict idealism. After all, if all reality exists in consciousness, how can the brain – which is a part of reality – filter down that which gives it its very existence? A water filter is not made of water; a coffee filter is not made of coffee; how can a consciousness filter be made of consciousness? It sounds like a self-referential contradiction. Yet, unless this apparent contradiction is resolved, idealism cannot be reconciled with the consciousness filter theory of the brain. Below, I will argue that, although this is a self-referential problem, it does not imply a contradiction.
The first step in resolving this apparent conflict is to emphasize that the word "filter" is used metaphorically here. What is meant is an image in consciousness of a process by means of which consciousness limits and localizes its own breath and depth. Since idealism is far less worked out as a philosophy than realism, we do not have an explicit and unambiguous terminology to articulate its ideas. Indeed, for the time being, we're limited to analogies and metaphors. So here is a metaphor to help one at least gain some intuition about how this could take place.
Think of consciousness as a stream. Water can flow along the stream through its entire length; that is, water is not localized in the stream, but traverses it unlimited. Now imagine a small whirlpool in the stream: It has a visible and identifiable existence; one can locate a whirlpool and delineate its boundaries precisely; one can point at it and say "here is a whirlpool!" There seems to be no question about how palpable and concrete the whirlpool seems to be. Moreover, the whirlpool somewhat limits and localizes the flow of water: The water molecules trapped in it can no longer traverse the course of the entire stream unbound, but become locked, swirling around a specific and well-defined location.
Let us try another analogy to deepen our intuition of this. Think of the brain as a "knot" that consciousness ties on itself. Indeed, a whirlpool is a kind of single-loop knot that water "ties on itself" and thereby restricts its own movement along a single, simple, circular trajectory. A single-loop knot is the smallest there is. Perhaps one could imagine the nervous system of a roundworm (C. elegans), with its 302 neurons, as a single-loop knot of consciousness that is extremely restrictive to awareness; the flow of consciousness in it is trapped into the simplest and smallest trajectory possible. As nervous systems become more complex, the constraints of the filter relax; more loops are added to the knot; complex tangles emerge. Although consciousness is still restricted to the localization system, it has more room to flow through more complex trajectories.
|Knots. Source: Wikipedia.|
To the idealist, everything exists in consciousness. So even a process by which consciousness limits and localizes itself should also produce an image in consciousness. It is thus not only unsurprising, but expected, that an image of the consciousness localization process should exist. And it so happens to be what we call a "brain." The very structure of the brain evokes an image of a complex knot and self-referential loops that somehow capture consciousness in a "closed tangle," as opposed to allowing it to flow freely. Carl Jung intuited this almost one hundred years ago in powerful, poetic words. The passage he wrote, and which I quote below, is from his personal diary, published in 2009 under the tittle "The Red Book" (the quote is from page 321). It takes the form of a conversation between his ego-consciousness ("I") and an autonomous psychic complex from his unconscious ("The Cabiri"):
"I: Let me see it, the great knot, all wound round! Truly a masterpiece of inscrutable nature, a wily natural tangle of roots grown through one another! Only Mother Nature, the blind weaver, could work such a tangle! A great snarled ball and a thousand small knots, all artfully tied, intertwined, truly, a human brain! Am I seeing straight? What did you do? You set my brain before me! Did you give me a sword so that its flashing sharpness slices through my brain? What were you thinking of?
"The Cabiri: The womb of nature wove the brain, the womb of the earth gave the iron [of the sword]. So the Mother gave you both: entanglement and severing.
"I: Mysterious! Do you really want to make me the executioner of my own brain?
"The Cabiri: It befits you as the master of the lower nature. Man is entangled in his brain and the sword is also given to him to cut through the entanglement.
"I: What is the entanglement you speak of?
"The Cabiri: The entanglement is your madness, the sword is the overcoming of madness."
Note: I'd like to thank the participants of the Skeptiko discussion forum for the spirited debates that inspired some of the articulations above.
Copyright © 2011 by Bernardo Kastrup. All rights are reserved.