368 An indifferent idea, like an indifferent sensation, is, in itself, not an object of attention. If it were an object of attention, it would not be indifferent; in other words, it would be interesting. In fact, it is in the very import of the word attention, that the object of it is interesting. And if an object is interesting it must be so, either in itself, or by association.
As we found that the having an interesting sensation, and the attending to that sensation, were not two distinguishable states of consciousness, but one and the same state of consciousness, let us now observe, as carefully as we can, whether the having an interesting idea is a state of consciousness, which can be distinguished from attending to it, or whether they are not merely two names for the same thing. When the young man, in love, has the idea of the woman, who is the object of his affections, is not attention merely another word for the peculiar nature of the Idea? In like manner in the mind of the man, who is to be executed to-morrow, the idea of the terrible event before him, is an idea in the very essence of which attention is involved. Attention is but another name for the interesting character of the idea.
If there are any cases to which an objector’s appeal can be made, they will be found, upon examination, to resemble those which we considered in the case of sensation, and which we found to be nothing more than instances of the prevalence of a stronger feeling over a weaker; stronger, either by its nature, or the peculiar circumstances of the moment. We shall not, therefore, stay to propound and explain them.
369 It only remains to expound the case in which an indifferent Idea becomes interesting by association. It cannot do so in any other way, than those in which it appeared that an indifferent sensation becomes interesting. It may be considered as the cause, or the sign, of some interesting state of consciousness. When that which is interesting becomes associated with that which is uninteresting, so as to form one compound state of consciousness, the whole is interesting. An idea, in itself indifferent, associated with interesting ideas, becomes part of a new compound which, as a whole, is interesting: and an interesting idea existing, and an interesting idea attended to, are only two names for the same thing.
In the case of Ideas, then, as in the case of sensations, attention to an interesting Idea, is merely having it; attention to an indifferent idea, is merely associating with it some idea that is interesting.
As far then, as ATTENTION gives us power over the trains of our ideas, it is not Will which gives it to us, but the occurrence of interesting sensations, or ideas.
There is not any of the phenomena, which are usually appealed to as the great manifestations of the power of the mind over its trains, which this mode of exposition does not satisfactorily account for. We may take as a sufficient exemplification of them all, the composition of a Discourse upon any important topic. The operation of the mind upon such an occasion seems to consist in a perpetual selection; that is, in the exercise of an uninterrupted power over 370 the trains of association. There is no doubt that it consists of that peculiar class of associations, to which we give the names, of selection, and power.
In composing a Discourse, a man has some end in view. It is for the attainment of this end, that the Discourse is undertaken. If every thing in the discourse tends to the accomplishment of the end, the Discourse is said to be coherent, appropriate, consistent. If there are many things in it which have no tendency, or but little tendency, to the accomplishment of the end, the discourse is said to be rambling, and incoherent.
This is a case, the exposition of which corresponds very much with that which we have already explained; the endeavour to recollect a forgotten Idea. In that case, the existence of an interesting idea calls up a variety of circumstances, that is, a variety of ideas; and it very often happens, that the idea which is sought for, is called up among them.
In this case, what the seeker has occasion for, is a single Idea; a single idea accomplishes the end he has in view. In the case of the composer of a discourse a great many ideas are wanted. His end cannot be attained by one or a few. But his proceeding is precisely of the same kind in regard to his many Ideas, as that of the man who desires to recollect in regard to his single Idea. He knows there are a number of ideas, connected with the end he has in view, which he can employ for his purpose, provided he can call them up. How they are called up, after the practice we have had in those solutions, requires but little explanation. The end in view is an interesting Idea. It is, at the time, the prevalent Idea. 371 It is that by which the man is stimulated to action. This idea calls up by association many ideas and trains of ideas. Of these a large proportion pass, and are not made use of. Others are detained and employed. This detaining and employing is all that needs to be explained. It is the same sort of result as the recognition of the forgotten Idea, in the case of recollection.