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Secondly, We may conclude from the same principle, that the sense of justice is not founded on reason, or on the discovery of certain connexions and relations of ideas, which are eternal, immutable, and universally obligatory. For since it is confessed, that such an alteration as that above-mentioned, in the temper and circumstances of mankind, would entirely alter our duties and obligations, 'tis necessary upon the common system, that the sense of virtue is derived from reason, to show the change which this must produce in the relations and ideas. But 'tis evident, that the only cause why the extensive generosity of man, and the perfect abundance of every thing, would destroy the[Pg 267] very idea of justice, is, because they render it useless; and that, on the other hand, his confined benevolence, and his necessitous condition, give rise to that virtue, only by making it requisite to the public interest, and to that of every individual. 'Twas therefore a concern for our own and the public interest which made us establish the laws of justice; and nothing can be more certain, than that it is not any relation of ideas which gives us this concern, but our impressions and sentiments, without which every thing in nature is perfectly indifferent to us, and can never in the least affect us. The sense of justice, therefore, is not founded on our ideas, but on our impressions.

Thirdly, We may farther confirm the foregoing proposition, that those impressions, which give rise to this sense of justice, are not natural to the mind of man, but arise from artifice and human conventions. For, since any considerable alteration of temper and circumstances destroys equally justice and injustice; and since such an alteration has an effect only by changing our own and the public interest, it follows, that the first establishment of the rules of justice depends on these different interests. But if men pursued the public interest naturally, and with a hearty affection, they would never have dreamed of restraining each other by these rules; and if they pursued their own interest, without any precaution, they would run headlong into every kind of injustice and violence. These rules, therefore, are artificial, and seek their end in an oblique and indirect manner; nor is the interest which gives rise to them of a kind that could be pursued by the natural and inartificial passions of men.

To make this more evident, consider, that, though the rules of justice are established merely by interest,[Pg 268] their connexion with interest is somewhat singular, and is different from what may be observed on other occasions. A single act of justice is frequently contrary to public interest; and were it to stand alone, without being followed by other acts, may, in itself, be very prejudicial to society. When a man of merit, of a beneficent disposition, restores a great fortune to a miser, or a seditious bigot, he has acted justly and laudably; but the public is a real sufferer. Nor is every single act of justice, considered apart, more conducive to private interest than to public; and 'tis easily conceived how a man may impoverish himself by a signal instance of integrity, and have reason to wish, that, with regard to that single act, the laws of justice were for a moment suspended in the universe. But, however single acts of justice may be contrary, either to public or private interest, 'tis certain that the whole plan or scheme is highly conducive, or indeed absolutely requisite, both to the support of society, and the well-being of every individual. 'Tis impossible to separate the good from the ill. Property must be stable, and must be fixed by general rules. Though in one instance the public be a sufferer, this momentary ill is amply compensated by the steady prosecution of the rule, and by the peace and order which it establishes in society. And even every individual person must find himself a gainer on balancing the account; since, without justice, society must immediately dissolve, and every one must fall into that savage and solitary condition, which is infinitely worse than the worst situation that can possibly be supposed in society. When, therefore, men have had experience enough to observe, that, whatever may be the consequence of any single act of justice, performed by a single person, yet the whole system of actions[Pg 269] concurred in by the whole society, is infinitely advantageous to the whole, and to every part, it is not long before justice and property take place. Every member of society is sensible of this interest: every one expresses this sense to his fellows, along with the resolution he has taken of squaring his actions by it, on condition that others will do the same. No more is requisite to induce any one of them to perform an act of justice, who has the first opportunity. This becomes an example to others; and thus justice establishes itself by a kind of convention or agreement, that is, by a sense of interest, supposed to be common to all, and where every single act is performed in expectation that others are to perform the like. Without such a convention, no one would ever have dreamed that there was such a virtue as justice, or have been induced to conform his actions to it. Taking any single act, my justice may be pernicious in every respect; and 'tis only upon the supposition that others are to imitate my example, that I can be induced to embrace that virtue; since nothing but this combination can render justice advantageous, or afford me any motives to conform myself to its rules.

We come now to the second question we proposed, viz. Why we annex the idea of virtue to justice, and of vice to injustice. This question will not detain us long after the principles which we have already established. All we can say of it at present will be despatched in a few words: and for farther satisfaction, the reader must wait till we come to the third part of this book. The natural obligation to justice, viz. interest, has been fully explained; but as to the moral obligation, or the sentiment of right and wrong, 'twill first be requisite to[Pg 270] examine the natural virtues, before we can give a full and satisfactory account of it.

After men have found by experience, that their selfishness and confined generosity, acting at their liberty, totally incapacitate them for society; and at the same time have observed, that society is necessary to the satisfaction of those very passions, they are naturally induced to lay themselves under the restraint of such rules, as may render their commerce more safe and commodious. To the imposition, then, and observance of these rules, both in general, and in every particular instance, they are at first induced only by a regard to interest; and this motive, on the first formation of society, is sufficiently strong and forcible. But when society has become numerous, and has increased to a tribe or nation, this interest is more remote; nor do men so readily perceive that disorder and confusion follow upon every breach of these rules, as in a more narrow and contracted society. But though, in our own actions, we may frequently lose sight of that interest which we have in maintaining order, and may follow a lesser and more present interest, we never fail to observe the prejudice we receive, either mediately or immediately, from the injustice of others; as not being in that case either blinded by passion, or biassed by any contrary temptation. Nay, when the injustice is so distant from us as no way to affect our interest, it still displeases us; because we consider it as prejudicial to human society, and pernicious to every one that approaches the person guilty of it. We partake of their uneasiness by sympathy; and as every thing which gives uneasiness in human actions, upon the general survey, is called Vice, and whatever produces satisfaction,[Pg 271] in the same manner, is denominated Virtue, this is the reason why the sense of moral good and evil follows upon justice and injustice. And though this sense, in the present case, be derived only from contemplating the actions of others, yet we fail not to extend it even to our own actions. The general rule reaches beyond those instances from which it arose; while, at the same time, we naturally sympathize with others in the sentiments they entertain of us.