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194 business of science here is to observe these changes and classify them.

This makes the matter very simple. The analogy between mind and matter seems to be as complete as could be wished, and nothing appears to stand in the way of the establishment of kindred sciences of the two founded upon this analogy. But let us look into the subject a little more closely; and not to rush hastily into any difficulties without a clue, let us commence with certain curious verbal or grammatical considerations which lie on the very surface of the exposition given of the usual scientific procedure, as applied both to nature and to man. A phenomenon breaking through the surface of language, and startling our opinions out of their very slumbers, makes its appearance, we may be sure, not without authentic credentials from some deeper source; and if we attend to them we may be assisted in rectifying our hasty views of truth, or in correcting errors that we may have overlooked by reason of the very obviousness and boldness with which they came before us. First, however, it is to be premised that the reader must suppose himself in the situation of one who can extract no more from language than what the words, of themselves, that is, taken irrespectively of any previously acquired knowledge on his part, afford to him. He must bring no supplementary thought of his own to eke out explanations which the words do not supply him with. He must not bridge or fill up with a sense born of his own mind, hiatuses which the language leaves gaping. It is only upon such conditions as these that the question upon which we are entering can be fairly canvassed; it is only upon these conditions that we can fairly test the "science of the human mind," and ascertain, as we are about to do from its verbal bearings, whether it be a valid or a nugatory research.

In order, therefore, to make sure that the requisitions demanded in the preceding chapter are complied with, let us suppose the following dialogue to take place between an "enquirer" into "the human mind," and an inhabitant of some planet different from ours: a person who can bring to the discussion neither ignorant prejudices nor learned prepossessions, and whose information respecting the subject in hand does not outrun the language in which it is conveyed.

The universe, commences the metaphysician, In order to show that the accompanying dialogue is not directed against imaginary errors in science, and also with the view of rendering the scope of our observations more obvious and clear, we will quote one or two specimens of the current metaphysical language of the day. The whole substance of Dr Brown's philosophy and scientific method is contained in the following passage.—"That which perceives," says he (namely, mind), "is a part of nature as truly as the objects of perception which act on it, and as a part of nature is itself an object of investigation purely physical. It is known to us only in the successive changes which constitute the variety of our feelings; but the regular sequence of these changes admits of being traced, like the regularity which we are capable of discovering in the successive organic changes of our bodily frame."—(Physiology of the Mind, p 1, 2.) "There is," says Dr Cook of St Andrews, "a mental constitution, through which communicate with the world around us." (Synopsis of Lectures, p. 4.) We could quote a hundred other instances of this kind of language, but these two are sufficient for our purpose. Now, what is the obvious and irresistible inference which such language as this forces upon us, or, rather, what is the plain meaning of the words we have quoted? It is this,—that we possess a mind just as we possess a body, that is to say, that man consists of three elements, mind, body, and himself possessing both. This view of the subject may be disclaimed and protested against in words, but still it continues virtually to form the leading idea of the whole of our popular psychology. We may, indeed, be told that "mind" and ourselves are identical, but this statement is never acted upon to any real purpose, this fact is never sifted with any degree of attention. If it were, then "mind" would be altogether annihilated as an object of investigation. This is what we have endeavoured to make out in the chapter which this note accompanies. is divided into two distinct orders of existence, mind and