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It has been observed, that nothing is ever present to the mind but its perceptions; and that all the actions of seeing, hearing, judging, loving, hating, and thinking, fall under this denomination. The mind can never exert itself in any action which we may not comprehend under the term of perception; and consequently that term is no less applicable to those judgments by which we distinguish moral good and evil, than to every other operation of the mind. To approve of one character, to condemn another, are only so many different perceptions.

Now, as perceptions resolve themselves into two kinds, viz. impressions and ideas, this distinction gives rise to a question, with which we shall open up our present inquiry concerning morals, whether 'tis by means of our ideas or impressions we distinguish betwixt vice and virtue, and pronounce an action blameable or praiseworthy? This will immediately cut off all loose discourses and declamations, and reduce us to something precise and exact on the present subject.

Those who affirm that virtue is nothing but a conformity to reason; that there are eternal fitnesses and unfitnesses of things, which are the same to every rational being that considers them; that the immutable measures of right and wrong impose an obligation, not[Pg 221] only on human creatures, but also on the Deity himself: all these systems concur in the opinion, that morality, like truth, is discerned merely by ideas, and by their juxtaposition and comparison. In order, therefore, to judge of these systems, we need only consider, whether it be possible, from reason alone, to distinguish betwixt moral good and evil, or whether there must concur some other principles to enable us to make that distinction.

If morality had naturally no influence on human passions and actions, 'twere in vain to take such pains to inculcate it; and nothing would be more fruitless than that multitude of rules and precepts with which all moralists abound. Philosophy is commonly divided into speculative and practical; and as morality is always comprehended under the latter division, 'tis supposed to influence our passions and actions, and to go beyond the calm and indolent judgments of the understanding. And this is confirmed by common experience, which informs us, that men are often governed by their duties, and are deterred from some actions by the opinion of injustice, and impelled to others by that of obligation.

Since morals, therefore, have an influence on the actions and affections, it follows, that they cannot be derived from reason; and that because reason alone, as we have already proved, can never have any such influence. Morals excite passions, and produce or prevent actions. Reason of itself is utterly impotent in this particular. The rules of morality, therefore, are not conclusions of our reason.

No one, I believe, will deny the justness of this inference; nor is there any other means of evading it, than by denying that principle, on which it is founded. As long as it is allowed, that reason has no influence[Pg 222] on our passions and actions, 'tis in vain to pretend that morality is discovered only by a deduction of reason. An active principle can never be founded on an inactive; and it reason be inactive in itself, it must remain so in all its shapes and appearances, whether it exerts itself in natural or moral subjects, whether it considers the powers of external bodies, or the actions of rational beings.

It would be tedious to repeat all the arguments, by which I have proved,[1] that reason is perfectly inert, and can never either prevent or produce any action or affection. 'Twill be easy to recollect what has been said upon that subject. I shall only recall on this occasion one of these arguments, which I shall endeavour to render still more conclusive, and more applicable to the present subject.

Reason is the discovery of truth or falsehood. Truth or falsehood consists in an agreement or disagreement either to the real relations of ideas, or to real existence and matter of fact. Whatever therefore is not susceptible of this agreement or disagreement, is incapable of being true or false, and can never be an object of our reason. Now, 'tis evident our passions, volitions, and actions, are not susceptible of any such agreement or disagreement; being original facts and realities, complete in themselves, and implying no reference to other passions, volitions, and actions. 'Tis impossible, therefore, they can be pronounced either true or false, and be either contrary or conformable to reason.

This argument is of double advantage to our present purpose. For it proves directly, that actions do not derive their merit from a conformity to reason, nor their blame from a contrariety to it; and it proves the[Pg 223] same truth more indirectly, by showing us, that as reason can never immediately prevent or produce any action by contradicting or approving of it, it cannot be the source of moral good and evil, which are found to have that influence. Actions may be laudable or blameable; but they cannot be reasonable or unreasonable: laudable or blameable, therefore, are not the same with reasonable or unreasonable. The merit and demerit of actions frequently contradict, and sometimes control our natural propensities. But reason has no such influence. Moral distinctions, therefore, are not the offspring of reason. Reason is wholly inactive, and can never be the source of so active a principle as conscience, or a sense of morals.

But perhaps it may be said, that though no will or action can be immediately contradictory to reason, yet we may find such a contradiction in some of the attendants of the action, that is, in its causes or effects. The action may cause a judgment, or may be obliquely caused by one, when the judgment concurs with a passion; and by an abusive way of speaking, which philosophy will scarce allow of, the same contrariety may, upon that account, be ascribed to the action. How far this truth or falsehood may be the source of morals, 'twill now be proper to consider.

It has been observed, that reason, in a strict and philosophical sense, can have an influence on our conduct only after two ways: either when it excites a passion, by informing us of the existence of something which is a proper object of it; or when it discovers the connexion of causes and effects, so as to afford us means of exerting any passion. These are the only kinds of judgment which can accompany our actions, or can be said to produce them in any manner; and it[Pg 224] must be allowed, that these judgments may often be false and erroneous. A person may be affected with passion, by supposing a pain or pleasure to lie in an object, which has no tendency to produce either of these sensations, or which produces the contrary to what is imagined. A person may also take false measures for the attaining of his end, and may retard, by his foolish conduct, instead of forwarding the execution of any project. These false judgments may be thought to affect the passions and actions, which are connected with them, and may be said to render them unreasonable, in a figurative and improper way of speaking. But though this be acknowledged, 'tis easy to observe, that these errors are so far from being the source of all immorality, that they are commonly very innocent, and draw no manner of guilt upon the person who is so unfortunate as to fall into them. They extend not beyond a mistake of fact, which moralists have not generally supposed criminal, as being perfectly involuntary. I am more to be lamented than blamed, if I am mistaken with regard to the influence of objects in producing pain or pleasure, or if I know not the proper means of satisfying my desires. No one can ever regard such errors as a defect in my moral character. A fruit, for instance, that is really disagreeable, appears to me at a distance, and, through mistake, I fancy it to be pleasant and delicious. Here is one error. I choose certain means of reaching this fruit, which are not proper for my end. Here is a second error; nor is there any third one, which can ever possibly enter into our reasonings concerning actions. I ask, therefore, if a man in this situation, and guilty of these two errors, is to be regarded as vicious and criminal, however unavoidable they might have been? Or if it be[Pg 225] possible to imagine, that such errors are the sources of all immorality?