Practical Essays. Alexander Bain
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in her circuit round the earth. Now, this generalising sweep is a real advance in our knowledge, an ascent in the matter of intelligence, a step towards centralising the empire of science. What is more, this is the only real meaning of EXPLANATION. A difficulty is solved, a mystery unriddled; when it can be shown to resemble something else; to be an example of a fact already known. Mystery is isolation, exception, or, it may be, apparent contradiction; the resolution of the mystery is found in assimilation, identity, fraternity. When all things are assimilated, so far as assimilation can go, so far as likeness holds, there is an end to explanation; there is an end to what the mind can do, or can intelligently desire.
[GRAVITY NOT A MYSTERY.]
Thus, when Gravity was generalised, by assimilating the terrestrial attraction seen in falling bodies with the celestial attraction of the sun and planets; and when, by fair presumption, the same power was extended to the remote stars; when, also, the law was ascertained, so that the movements of the various bodies could be computed and predicted, there was nothing further to be done; explanation was exhausted. Unless we can find some other force to fraternise with gravity, so that the two might become a still more comprehensive unity, we must rest in gravity as the ultimatum of our faculties. There is no conceivable modification, or substitute, that would better our position. Before Newton, it was a mystery what kept the moon and the planets in their places; the assimilation with falling bodies was the solution. But, say many persons, is not gravity itself a mystery? We say No; gravity has passed through all the stages of legitimate and possible explanation; it is the most highly generalised of all physical facts, and by no assignable transformation could it be made more intelligible than it is. It is singularly easy of comprehension; its law is exactly known; and, excepting the details of calculation, in its more complex workings, there is nothing to complain of, nothing to rectify, nothing to pretend ignorance about; it is the very pattern, the model, the consummation of knowledge. The path of science, as exhibited in modern times, is towards generality, wider and wider, until we reach the highest, the widest laws of every department of things; there explanation is finished, mystery ends, perfect vision is gained.
What is always reckoned the mystery by pre-eminence is the union of BODY and MIND. How, then, should we treat this Mystery according to the spirit of modern thought, according to the modern laws of explanation? The course is to conceive the elements according to the only possible plan, our own sensibility or consciousness; which gives us matter as one class of facts—extension, inertness, weight, and so on; and mind as another class of facts—pleasures, pains, volitions, ideas. The difference between these two is total, diametrical, complete; there is really nothing common to the experience of pleasure and the experience of a tree; difference has here reached its acme; agreement is eliminated; there is no higher genus to include these two in one; as the ultimate, the highest elements of knowledge, they admit of 110 fusion, no resolution, no unity. Our utmost flight of generality leaves us in possession of a double, a couple of absolutely heterogeneous elements. Matter cannot be resolved into mind; mind cannot be resolved into matter; each has its own definition; each negatives the other.
This being the fact, we accept it, and acquiesce. There is surely nothing to be dissatisfied with, to complain of, in the circumstance that the elements of our experience are, in the last resort, two, and not one. If we had been provided with fifty ultimate experiences, none of them having a single property in common with any other; and if we had only our present limited intellects, we might be entitled to complain of the world's mysteriousness in the one proper acceptation of mystery—namely, as overpowering our means of comprehension, as loading us with unassimilable facts. As it is, matter, in its commoner aspects and properties, is perfectly intelligible; in the great number and variety of its endowments or properties, it is revealed to us slowly and with much difficulty, and these subtle properties—the deep affinities and molecular arrangements— are the mysteries rightly so called. Mind in itself is also intelligible; a pleasure is as intelligible as would be any transmutation of it into the inscrutable essence that people often desiderate. It is one of the facts of our sensibility, and has a great many facts of its own kindred, which makes it all the more intelligible.
The varieties of pleasure, pain, and emotion are very numerous; and to know, remember, and classify them, is a work of labour, a legitimate mystery. The subtle links of thought are also very various, although probably all reducible to a small number; and the ascertaining and following out of these has been a work of labour and time; they have, therefore, been mysterious; mystery and intellectual toil being the real correlatives. The complications of matter and the complications of mind are genuine mysteries; the reducing or simplifying of these complications, by the exertions of thinking men, is the way, and the only way out of the darkness into light.
[UNION OF MIND AND BODY.]
But what now of the mysterious union of the two great ultimate facts of human experience? What should the followers of Newton and Locke say to this crowning instance of deep and awful mystery? Only one answer can be given. Accept the union, and generalise it. Find out the fewest number of simple laws, such as will express all the phenomena of this conjoint life. Resolve into the highest possible generalities the connections of pleasure and pain, with all the physical stimulants of the senses—food, tastes, odours, sounds, lights—with all the play of feature and of gesture, and all the resulting movements and bodily changes; and when you have done that, you have so far truly, fully, finally explained the union of body and mind. Extend your generalities to the course of the thoughts; determine what physical changes accompany the memory, the reason, the imagination, and express those changes in the most general, comprehensive laws, and you have explained the how and the why brain causes thought, and thought works in brain. There is no other explanation needful, no other competent, no other that would be explanation. Instead of our being "unfortunate," as is sometimes said, in not being able to know the essence of either matter or mind—in not comprehending their union; our misfortune would be to have to know anything different from what we do or may know. If there be still much mystery attaching to this linking of the two extreme facts of our experience, it is simply this: that we have made so little way in ascertaining what in one goes with what in the other. We know a good deal about the feelings and their alliances, some of which are open and palpable to all mankind; and we have obtained some important generalities in these alliances. Of the connections of thought with physical changes we know very little: these connections, therefore, are truly and properly mysterious; but they are not intrinsically or hopelessly so. The advancing study of the physical organs, on the one hand, and of the mental functions, on the other, may gradually abate this mystery. And if a day arrive when the links that unite our intellectual workings with the workings of the nervous system and the other bodily organs shall be fully ascertained and adequately generalised, no one thoroughly educated in the scientific spirit of the last two centuries will call the union of mind and body any longer inscrutable or mysterious.
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