We first have to start from the top, from some conception of what consciousness is, from what our own introspection is. We have to be sure of that, before we can enter the nervous system and talk about its neurology.
We must therefore try to make a new beginning by stating what consciousness is. We have already seen that this is no easy matter, and that the history of the subject is an enormous confusion of metaphor with designation. In any such situation, where something is so resistant to even the beginnings of clarity, it is wisdom to begin by determining what that something is not. And that is the task of the next chapter.
BOOK ONE
The Mind of Man
C H A P T E R 1
The Consciousness
of Consciousness
WHEN ASKED the question, what is consciousness? we become conscious of consciousness. And most of us take this consciousness of consciousness to be what consciousness is. This is not true.
In being conscious of consciousness, we feel it is the most self-evident thing imaginable. We feel it is the defining attribute of all our waking states, our moods and affections, our memories, our thoughts, attentions, and volitions. We feel comfortably certain that consciousness is the basis of concepts, of learning and reasoning, of thought and judgment, and that it is so because it records and stores our experiences as they happen, allowing us to introspect on them and learn from them at will. We are also quite conscious that all this wonderful set of operations and contents that we call consciousness is located somewhere in the head.
On critical examination, all of these statements are false.
They are the costume that consciousness has been masquerading in for centuries. They are the misconceptions that have prevented a solution to the problem of the origin of consciousness.
To demonstrate these errors and show what consciousness is not, is the long but I hope adventurous task of this chapter.
The Extensiveness of Consciousness
To begin with, there are several uses of the word consciousness which we may immediately discard as incorrect. We have for
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example the phrase "to lose consciousness” after receiving a blow on the head. But if this were correct, we would then have no word for those somnambulistic states known in the clinical literature where an individual is clearly not conscious and yet is responsive to things in a way in which a knocked-out person is not.
Therefore, in the first instance we should say that the person suffering a severe blow on the head loses both consciousness and what I am calling reactivity, and they are therefore different things.
This distinction is also important in normal everyday life. We are constantly reacting to things without being conscious of them at the time. Sitting against a tree, I am always reacting to the tree and to the ground and to my own posture, since if I wish to walk, I will quite unconsciously stand up from the ground to do so.
Immersed in the ideas of this first chapter, I am rarely conscious even of where I am. In writing, I am reacting to a pencil in my hand since I hold on to it, and am reacting to my writing pad since I hold it on my knees, and to its lines since I write upon them, but I am only conscious of what I am trying to say and whether or not I am being clear to you.
If a bird bursts up from the copse nearby and flies crying to the horizon, I may turn and watch it and hear it, and then turn back to this page without being conscious that I have done so.
In other words, reactivity covers all stimuli my behavior takes account of in any way, while consciousness is something quite distinct and a far less ubiquitous phenomenon. We are conscious of what we are reacting to only from time to time. And whereas reactivity can be defined behaviorally and neurologically, consciousness at the present state of knowledge cannot.
But this distinction is much more far-reaching. We are continually reacting to things in ways that have no phenomenal component in consciousness whatever. Not at any time. In seeing any object, our eyes and therefore our retinal images are reacting to the object by shifting twenty times a second, and yet
T H E C O N S C I O U S N E S S O F C O N S C I O U S N E S S 2 3
we see an unshifting stable object with no consciousness whatever of the succession of different inputs or of putting them together into the object. An abnormally small retinal image of something in the proper context is automatically seen as something at a distance; we are not conscious of making the correction. Color and light contrast effects, and other perceptual constancies all go on every minute of our waking and even dreaming experience without our being in the least conscious of them. And these instances are barely touching the multitude of processes which by the older definitions of consciousness one might expect to be conscious of, but which we definitely are not.
I am here thinking of Titchener’s designation of consciousness as
“the sum total of mental processes occurring now.” We are now very far from such a position.
But let us go further. Consciousness is a much smaller part of our mental life than we are conscious of, because we cannot be conscious of what we are not conscious of. How simple that is to say; how difficult to appreciate! It is like asking a flashlight in a dark room to search around for something that does not have any light shining upon it. The flashlight, since there is light in whatever direction it turns, would have to conclude that there is light everywhere. And so consciousness can seem to pervade all mentality when actually it does not.
The timing of consciousness is also an interesting question.
When we are awake, are we conscious all the time? We think so. In fact, we are sure so! I shut my eyes and even if I try not to think, consciousness still streams on, a great river of contents in a succession of different conditions which I have been taught to call thoughts, images, memories, interior dialogues, regrets, wishes, resolves, all interweaving with the constantly changing pageant of exterior sensations of which I am selectively aware.
Always the continuity. Certainly this is the feeling. And whatever we’re doing, we feel that our very self, our deepest of deep
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identity, is indeed this continuing flow that only ceases in sleep between remembered dreams. This is our experience. And many thinkers have taken this spirit of continuity to be the place to start from in philosophy, the very ground of certainty which no one can doubt. Cogito, ergo sum.
But what could this continuity mean? If we think of a minute as being sixty thousand milliseconds, are we conscious for every one of those milliseconds? If you still think so, go on dividing the time units, remembering that the firing of neurons is of a finite order — although we have no idea what that has to do with our sense of the continuity of consciousness. Few persons would wish to maintain that consciousness somehow floats like a mist above and about the nervous system completely ununited to any earthly necessities of neural refractory periods.
It is much more probable that the seeming continuity of consciousness is really an illusion, just as most of the other metaphors about consciousness are. In our flashlight analogy, the flashlight would be conscious of being on only when it is on.
Though huge gaps of time occurred, providing things were generally the same, it would seem to the flashlight itself that the light had been continuously on. We are thus conscious less of the time than we think, because we cannot be conscious of when we are not conscious. And the feeling of a great uninterrupted stream of rich inner experiences, now slowly gliding through dreamy moods, now tumbling in excited torrents down gorges of precipitous insight, or surging evenly through our nobler days, is what it is on this page, a metaphor for how subjective consciousness seems to subjective consciousness.