The exhaustive treatment of this subject would require a length and abundance of discussion disproportioned to the compass and purposes of a treatise like the present, which was intended to expound what the author believed to be the real mode of formation of our complex states of consciousness, but not to say all that may and ought to be said in refutation of other views of the subject. There are, however, some important parts of the author’s own theory, which are not stated in this work, but in a subsequent one, of a highly polemical character, the “Fragment on Mackintosh:” and it may be both instructive and interesting to the reader to find the statement here. I therefore subjoin the passages containing it.
“Nature makes no classes. Nature makes individuals. Classes are made by men; and rarely with such marks as determine certainly what is to be included in them.
310 “Men make classifications, as they do everything else, for some end. Now, for what end was it that men, out of their innumerable acts, selected a class, to which they gave the name of moral, and another class, to which they gave the name of immoral? What was the motive of this act? What its final cause?
“Assuredly the answer to this question is the first step, though Sir James saw it not, towards the solution of his two questions, comprehending the whole of ethical science; first, what makes an act to be moral? and secondly, what are the sentiments with which we regard it?
“We may also be assured, that it was some very obvious interest which recommended this classification; for it was performed, in a certain rough way, in the very rudest states of society.
“Farther, we may easily see how, even in very rude states, men were led to it, by little less than necessity. Every day of their lives they had experience of acts, some of which were agreeable, or the cause of what was agreeable, to them; others disagreeable, or the cause of what was disagreeable to them, in all possible degrees.
“They had no stronger interest than to obtain the repetition of the one sort, and to prevent the repetition of the other.
“The acts in which they were thus interested were of two sorts; first, those to which the actor was led by a natural interest of his own; secondly, those to which the actor was not led by any interest of his own. About the first sort there was not occasion for any particular concern. They were pretty sure to take place, without any stimulus from without. The second sort, on the contrary, were not likely to take place, unless an interest was artificially created, sufficiently strong to induce the actor to perform them.
“And here we clearly perceive the origin of that important case of classification .… the classification of acts as moral and immoral. The acts, which it was important to other men that each individual should perform, but in which the individual had not a sufficient interest to secure the 311 performance of them, were constituted one class. The acts, which it was important to other men that each individual should abstain from, but in regard to which he had not a personal interest sufficiently strong to secure his abstaining from them, were constituted another class. The first class were distinguished by the name moral acts; the second by the name immoral.
“The interest which men had in securing the performance of the one set of acts, the non-performance of the other, led them by a sort of necessity to think of the means. They had to create an interest, which the actor would not otherwise have, in the performance of the one sort, the non-performance of the other. And in proceeding to this end, they could not easily miss their way. They had two powers applicable to the purpose. They had a certain quantity of good at their disposal; and they had a certain quantity of evil. If they could apply the good in such a manner as to afford a motive both for the performance and non-performance which they desired, or the evil, in such a manner as to afford a motive against the performance and non-performance which they wished to prevent, their end was attained.