As our mental fields succeed one another, each has its centre of interest, around which the objects of which we are less and less attentively conscious fade to a margin so faint that its limits are unassignable. Some fields are narrow fields and some are wide fields. Usually when we have a wide field we rejoice, for we then see masses of truth together, and often get glimpses of relations which we divine rather than see, for they shoot beyond the field into still remoter regions of objectivity, regions which we seem rather to be about to perceive than to perceive actually. At other times, of drowsiness, illness, or fatigue, our fields may narrow almost to a point, and we find ourselves correspondingly oppressed and contracted.
Different individuals present constitutional differences in this matter of width of field. Your great organizing geniuses are men with habitually vast fields of mental vision, in which a whole programme of future operations will appear dotted out at once, the rays shooting far ahead into definite directions of advance.
In common people there is never this magnificent inclusive view of a topic. They stumble along, feeling their way, as it were, from point to point, and often stop entirely. In certain diseased conditions consciousness is a mere spark, without memory of the past or thought of the future, and with the present narrowed down to some one simple emotion or sensation of the body.
The important fact which this "field" formula commemorates is the indetermination of the margin. Inattentively realized as is the matter which the margin contains, it is nevertheless there, and helps both to guide our behavior and to determine the next movement of our attention. It lies around us like a "magnetic field," inside of which our centre of energy turns like a compass-needle, as the present phase of consciousness alters into its successor. Our whole past store of memories floats beyond this margin, ready at a touch to come in; and the entire mass of residual powers, impulses, and knowledges that constitute our empirical self stretches continuously beyond it. So vaguely drawn are the outlines between what is actual and what is only potential at any moment of our conscious life, that it is always hard to say of certain mental elements whether we are conscious of them or not.
The ordinary psychology, admitting fully the difficulty of tracing the marginal outline, has nevertheless taken for granted, first, that all the consciousness the person now has, be the same focal or marginal, inattentive or attentive, is there in the "field" of the moment, all dim and impossible to assign as the latter's outline may be; and, second, that what is absolutely extra-marginal is absolutely non-existent. and cannot be a fact of consciousness at all.
And having reached this point, I must now ask you to recall what I said in my last lecture about the subconscious life. I said, as you may recollect, that those who first laid stress upon these phenomena could not know the facts as we now know them. My first duty now is to tell you what I meant by such a statement.
I cannot but think that the most important step forward that has occurred in psychology since I have been a student of that science is the discovery, first made in 1886, that, in certain subjects at least, there is not only the consciousness of the ordinary field, with its usual centre and margin, but an addition thereto in the shape of a set of memories, thoughts, and feelings which are extra-marginal and outside of the primary consciousness altogether, but yet must be classed as conscious facts of some sort, able to reveal their presence by unmistakable signs. I call this the most important step forward because, unlike the other advances which psychology has made, this discovery has revealed to us an entirely unsuspected peculiarity in the constitution of human nature. No other step forward which psychology has made can proffer any such claim as this.
In particular this discovery of a consciousness existing beyond the field, or subliminally as Mr. Myers terms it, casts light on many phenomena of religious biography. That is why I have to advert to it now, although it is naturally impossible for me in this place to give you any account of the evidence on which the admission of such a consciousness is based. You will find it set forth in many recent books, Binet's Alterations of Personality[123] being perhaps as good a one as any to recommend.
[123] Published in the International Scientific Series.
The human material on which the demonstration has been made has so far been rather limited and, in part at least, eccentric, consisting of unusually suggestible hypnotic subjects, and of hysteric patients. Yet the elementary mechanisms of our life are presumably so uniform that what is shown to be true in a marked degree of some persons is probably true in some degree of all, and may in a few be true in an extraordinarily high degree.
The most important consequence of having a strongly developed ultra-marginal life of this sort is that one's ordinary fields of consciousness are liable to incursions from it of which the subject does not guess the source, and which, therefore, take for him the form of unaccountable impulses to act, or inhibitions of action, of obsessive ideas, or even of hallucinations of sight or hearing. The impulses may take the direction of automatic speech or writing, the meaning of which the subject himself may not understand even while he utters it; and generalizing this phenomenon, Mr. Myers has given the name of automatism, sensory or motor, emotional or intellectual, to this whole sphere of effects, due to "up-rushes" into the ordinary consciousness of energies originating in the subliminal parts of the mind.
