But though reason is undoubtedly the source of the general rules of morality, and of all the moral judgments which we form by means of them; it is altogether absurd and unintelligible to suppose that the first perceptions of right and wrong can be derived from reason, even in those particular cases upon the experience of which the general rules are formed. These first perceptions, as well all other experiments upon which any general rules are founded, cannot be the object of reason, but of immediate sense and feeling. It is by finding in a vast variety of instances that one tenour of conduct constantly pleases in a certain manner, and that another as constantly displeases the mind, that we form the general rules of morality. But reason cannot render any particular object either agreeable or disagreeable to the mind for its own sake. Reason may show that this object is the means of obtaining some other which is naturally either pleasing or displeasing, and in this manner may render it either agreeable or disagreeable for the sake of something else. But nothing can be agreeable or disagreeable for its own sake, which is not rendered such by immediate sense and feeling. If virtue, therefore, in every particular instance, necessarily pleases for its own sake, and if vice as certainly displeases the mind, it cannot be reason, but immediate sense and feeling, which, in this manner, reconciles us to the one, and alienates us from the other. Pleasure and pain are the great objects of desire and aversion: but these are distinguished not by reason, but by immediate sense and feeling. If virtue, therefore, is desirable for its own sake, and if vice is, in the same manner, the object of aversion, it cannot be reason which originally distinguishes those different qualities, but immediate sense and feeling. As reason, however, in a certain sense, may justly be considered as the principle of approbation and disapprobation, these sentiments were, through inattention, long regarded as originally flowing from the operations of this faculty. Dr. Hutcheson had the merit of being the first who distinguished with any degree of precision in what respect all moral distinctions may be said to arise from reason, and in what respect they are founded upon immediate sense and feeling. In his illustrations upon the moral sense he has explained this so fully, and, in my opinion, so unanswerably, that, if any controversy is still kept up about this subject, I can impute it to nothing, but either to inattention to what that gentleman has written, or to a superstitious attachment to certain forms of expression, a weakness not very uncommon among the learned, especially in subjects so deeply interesting as the present, in which a man of virtue is often loth to abandon, even the propriety of a single phrase which he has been accustomed to. CHAP. III. _Of those systems which make sentiment the principle of approbation._