These researches, however, when they came to take place, confirmed those original anticipations of nature. Upon whatever we suppose that moral faculties are founded, whether upon a certain modification of reason, upon an original instinct, called a moral sense, or upon some other principle of our nature, it cannot be doubted, that they were given us for the direction of our conduct in this life. They carry along with them the most evident badges of this authority, which denote that they were set up within us to be the supreme arbiters of all our actions, to superintend all our senses, passions, and appetites, and to judge how each of them was either to be indulged or restrained. Our moral faculties are by no means, as some have pretended, upon a level in this respect with the other faculties and appetites of our nature, endowed with no more right to restrain these last, than these last are to restrain them. No other faculty or principle of action judges of any other. Love does not judge of resentment, nor resentment of love. Those two passions may be opposite to one another, but cannot, with any propriety, be said to approve or disapprove of one another. But it is the peculiar office of those faculties now under our consideration to judge, to bestow censure or applause upon all the other principles of our nature. They may be considered as a sort of senses of which those principles are the objects. Every sense is supreme over its own objects. There is no appeal from the eye with regard to the beauty of colours, nor from the ear with regard to the harmony of sounds, nor from the taste with regard to the agreeableness of flavours. Each of those senses judges in the last resort of its own objects. Whatever gratifies the taste is sweet, whatever pleases the eye is beautiful, whatever soothes the ear is harmonious. The very essence of each of those qualities consists in its being fitted to please the sense to which it is addressed. It belongs to our moral faculties, in the same manner to determine when the ear ought to be soothed, when the eye ought to be indulged, when the taste ought to be gratified, when and how far every other principle of our nature ought either to be indulged or restrained. What is agreeable to our moral faculties, is fit, and right, and proper to be done; the contrary wrong, unfit, and improper. The sentiments which they approve of, are graceful and becoming: the contrary, ungraceful and unbecoming. The very words, right, wrong, fit, improper, graceful, unbecoming, mean only what pleases or displeases those faculties.
Since these, therefore, were plainly intended to be the governing principles of human nature, the rules which they prescribe are to be regarded as the commands and laws of the Deity, promulgated by those vicegerents which he has thus set up within us. All general rules are commonly denominated laws: thus the general rules which bodies observe in the communication of motion, are called the laws of motion. But those general rules which our moral faculties observe in approving or condemning whatever sentiment or action is subjected to their examination, may much more justly be denominated such. They have a much greater resemblance to what are properly called laws, those general rules which the sovereign lays down to direct the conduct of his subjects. Like them they are rules to direct the free actions of men: they are prescribed most surely by a lawful superior, and are attended too with the sanction of rewards and punishments. Those vicegerents of God within us, never fail to punish the violation of them, by the torments of inward shame, and self-condemnation; and on the contrary, always reward obedience with tranquillity of mind, with full contentment and self-satisfaction.
There are innumerable other considerations which serve to confirm the same conclusion. The happiness of mankind, as well as of all other rational creatures, seems to have been the original purpose intended by the Author of nature, when he brought them into existence. No other end seems worthy of that supreme wisdom and divine benignity which we necessarily ascribe to him; and this opinion, which we are led to by the abstract consideration of his infinite perfections, is still more confirmed by the examination of the works of nature, which seem all intended to promote happiness, and to guard against misery. But by acting accordingly to the dictates of our moral faculties, we necessarily pursue the most effectual means for promoting the happiness of mankind, and may therefore be said, in some sense, to cooperate with the Deity, and to advance as far as in our power the