other. But the relation of passions is not alone sufficient. 'Tis likewise necessary there should be a relation of ideas. The beauty of one person never inspires us with love for another. This then is a sensible proof of the double relation of impressions and ideas. From one instance so evident as this we may form a judgment of the rest.
This may also serve in another view to illustrate what I have insisted on concerning the origin of pride and humility, love and hatred. I have observed, that though self be the object of the first set of passions, and some other person of the second, yet these objects cannot alone be the causes of the passions, as having each of them a relation to two contrary affections, which must from the very first moment destroy each other. Here then is the situation of the mind, as I have already described it. It has certain organs naturally fitted to produce a passion; that passion, when produced, naturally turns the view to a certain object. But this not being sufficient to produce the passion, there is required some other emotion, which, by a double relation of impressions and ideas, may set these principles in action, and bestow on them their first impulse. This situation is still more remarkable with regard to the appetite of generation. Sex is not only the object, but also the cause of the appetite. We not only turn our view to it, when actuated by that appetite, but the reflecting on it suffices to excite the appetite. But as this cause loses its force by too great frequency, 'tis necessary it should be quickened by some new impulse; and that impulse we find to arise from the _beauty_ of the _person_; that is, from a double relation of impressions and ideas. Since this double relation is necessary where an affection has both a distinct cause and object, how much more so where it has only a distinct object without any determinate cause!
SECTION XII.
OF THE LOVE AND HATRED OF ANIMALS.
But to pass from the passions of love and hatred, and from their mixtures and compositions, as they appear in man, to the same affections as they display themselves in brutes, we may observe, not only that love and hatred are common to the whole sensitive creation, but likewise that their causes, as above explained, are of so simple a nature that they may easily be supposed to operate on mere animals.
There is no force of reflection or penetration required. Every thing is conducted by springs and principles, which are not peculiar to man, or any one species of animals. The conclusion from this is obvious in favour of the foregoing system.
Love, in animals, has not for its only object animals of the same species, but extends itself farther, and comprehends almost every sensible and thinking being. A dog naturally loves a man above his own species, and very commonly meets with a return of affection.
As animals are but little susceptible either of the pleasures or pains of the imagination, they can judge of objects only by the sensible good or evil which they produce, and from _that_ must regulate their affections towards them. Accordingly we find, that by benefits or injuries we produce their love or hatred; and that, by feeding and cherishing any animal, we quickly acquire his affections; as by beating and abusing him we never fail to draw on us his enmity and ill-will.
Love in beasts is not caused so much by relation as in our species; and that because their thoughts are not so active as to trace relations, except in very obvious instances. Yet 'tis easy to remark, that on some occasions it has a considerable influence upon them. Thus, acquaintance, which has the same effect as relation, always produces love in animals, either to men or to each other. For the same reason, any likeness among them is the source of affection. An ox confined to a park with horses, will naturally join their company, if I may so speak, but always leaves it to enjoy that of his own species, where he has the choice of both.
The affection of parents to their young proceeds from a peculiar instinct in animals, as well as in our species.
'Tis evident that _sympathy_, or the communication of passions, takes place among animals, no less than among men. Fear, anger, courage, and other affections, are frequently communicated from one animal to another, without their knowledge of that cause which produced the original passion. Grief likewise is received by sympathy, and produces almost all the same consequences, and excites the same emotions, as in our species. The howlings and lamentations of a dog produce a sensible concern in his fellows. And 'tis remarkable, that though almost all animals use in play the same member, and nearly the same action as in fighting; a lion, a tiger, a cat, their paws; an ox, his horns; a dog, his teeth; a horse, his heels: yet they most carefully avoid harming their companion, even though they have nothing to fear from his resentment; which is an evident proof of the sense brutes have of each other's pain and pleasure.
Every one has observed how much more dogs are animated when they hunt in a pack, than when they pursue their game apart; and 'tis evident this can proceed from nothing but from sympathy. 'Tis also well known to hunters, that this effect follows in a greater degree, and even in too great a degree, where too packs that are strangers to each other are joined together. We might, perhaps, be at a loss to explain this phenomenon, if we had not experience of a similar in ourselves.
Envy and malice are passions very remarkable in animals. They are perhaps more common than pity; as requiring less effort of thought and imagination.
PART III.
OF THE WILL AND DIRECT PASSIONS.
SECTION I.
OF LIBERTY AND NECESSITY.
We come now to explain the _direct_ passions, or the impressions which arise immediately from good or evil, from pain or pleasure. Of this kind are, _desire and aversion, grief and joy, hope and fear._ Of all the immediate effects of pain and pleasure, there is none more remarkable than the _will_; and though, properly speaking, it be not comprehended among the passions, yet, as the full understanding of its nature and properties is necessary to the explanation of them, we shall here make it the subject of our inquiry. I desire it may be observed, that, by the _will_, I mean nothing but _the internal impression we feel, and are conscious of, when we knowingly give rise to any new motion of our body, or new perception of our mind_. This impression, like the preceding ones of pride and humility, love and hatred, 'tis impossible to define, and needless to describe any farther; for which reason we shall cut off all those definitions and distinctions with which philosophers are wont to perplex rather than clear up this question; and entering at first upon the subject, shall examine that long-disputed question concerning _liberty and necessity_, which occurs so naturally in treating of the will.
'Tis universally acknowledged that the operations of external bodies are necessary; and that, in the communication of their motion, in their attraction, and mutual cohesion, there are not the least traces of indifference or liberty. Every object is determined by an absolute fate to a certain degree and direction of its motion, and can no more depart from that precise line in which it moves, than it can convert itself into an angel, or spirit, or any superior substance. The actions, therefore, of matter, are to be regarded as instances of necessary actions; and whatever is, in this respect, on the same footing with matter, must be acknowledged to be necessary. That we may know whether this be the case with the actions of the mind, we shall begin with examining matter, and considering on what the idea of a necessity in its operations are founded, and why we conclude one body or action to be the infallible cause of another.
It has been observed already, that in no single instance the ultimate connexion of any objects is discoverable either by our senses or reason, and that we can never penetrate so far into the essence and construction of bodies, as to perceive the principle on which their mutual influence depends. 'Tis their constant union alone with which we are acquainted; and 'tis from the constant union the necessity arises. If objects had not an uniform and regular conjunction with each other, we should never arrive at any idea of cause and effect; and even after all, the necessity which enters into that idea, is nothing but a determination of the mind to pass from one object to its usual attendant, and infer the existence of one from that of the other. Here then are two particulars which we are to consider as essential to necessity, viz. the constant _union_ and the _inference_ of the mind; and wherever we discover these, we must acknowledge a necessity. As the actions of matter have no necessity but what is derived from these circumstances, and it is not by any insight into the essence of bodies we discover their connexion, the absence of this insight, while the union and inference remain, will never, in any case, remove the necessity. 'Tis the observation of the union which produces the inference; for which reason it might be thought sufficient, if we prove a constant union in the actions of the mind, in order to establish the inference along with the necessity of these actions. But that I may bestow a greater force on my reasoning, I shall examine these particulars apart, and shall first prove from experience that our actions have a constant union with our motives, tempers, and circumstances, before I consider the inferences we draw from it.
To this end a very slight and general view of the common course of human affairs will be sufficient. There is no light in which we can take them that does not confirm this principle. Whether we consider mankind according to the difference of sexes, ages, governments, conditions, or methods of education; the same uniformity and regular operation of natural principles are discernible. Like causes still produce like effects; in the same manner as in the mutual action of the elements and powers of nature.
There are different trees which regularly produce fruit, whose relish is different from each other; and this regularity will be admitted as an instance of necessity and causes in external bodies. But are the products of Guienne and of Champagne more regularly different than the sentiments, actions, and passions of the two sexes, of which the one are distinguished by their force and maturity, the other by their delicacy and softness?
Are the changes of our body from infancy to old age more regular and certain than those of our mind and conduct? And would a man be more ridiculous, who would expect that an infant of four years old will raise a weight of three hundred pounds, than one who, from a person of the same age, would look for a philosophical reasoning, or a prudent and well concerted action?
We must certainly allow, that the cohesion of the parts of matter arises from natural and necessary principles, whatever difficulty we may find in explaining them: and for a like reason we must allow, that human society is founded on like principles; and our reason in the latter case is better than even that in the former; because we not only observe that men _always_ seek society, but can also explain the principles on which this universal propensity is founded. For it is more certain that two flat pieces of marble will unite together, than two young savages of different sexes will copulate? Do the children arise from this copulation more uniformly, than does the parents' care for their safety and preservation? And after they have arrived at years of discretion by the care of their parents, are the inconveniences attending their separation more certain than their foresight of these inconveniences, and their care of avoiding them by a close union and confederacy?
The skin, pores, muscles, and nerves of a day-labourer, are different from those of a man of quality: so are his sentiments, actions, and manners. The different stations of life influence the whole fabric, external and internal; and these different stations arise necessarily, because uniformly, from the necessary and uniform principles of human nature. Men cannot live without society, and cannot be associated without government. Government makes a distinction of property, and establishes the different ranks of men. This produces industry, traffic, manufactures, lawsuits, war, leagues, alliances, voyages, travels, cities, fleets, ports, and all those other actions and objects which cause such a diversity, and at the same time maintain such an uniformity in human life.
Should a traveller, returning from a far country, tell us, that he had seen a climate in the fiftieth degree of northern latitude, where all the fruits ripen and come to perfection in the winter, and decay in the summer, after the same manner as in England they are produced and decay in the contrary seasons, he would find few so credulous as to believe him. I am apt to think a traveller would meet with as little credit, who should inform us of people exactly of the same character with those in Plato's republic on the one hand, or those in Hobbes's _Leviathan_ on the other. There is a general course of nature in human actions, as well as in the operations of the sun and the climate. There are also characters peculiar to different nations and particular persons, as well as common to mankind. The knowledge of these characters is founded on the observation of an uniformity in the actions that flow from them; and this uniformity forms the very essence of necessity.
I can imagine only one way of eluding this argument, which is by denying that uniformity of human actions, on which it is founded. As long as actions have a constant union and connexion with the situation and temper of the agent, however we may in words refuse to acknowledge the necessity, we really allow the thing. Now, some may perhaps find a pretext to deny this regular union and connexion. For what is more capricious than human actions? What more inconstant than the desires of man? And what creature departs more widely, not only from right reason, but from his own character and disposition? An hour, a moment is sufficient to make him change from one extreme to another, and overturn what cost the greatest pain and labour to establish. Necessity is regular and certain. Human conduct is irregular and uncertain. The one therefore proceeds not from the other.
To this I reply, that in judging of the actions of men we must proceed upon the same maxims, as when we reason concerning external objects.
When any phenomena are constantly and invariably conjoined together, they acquire such a connexion in the imagination, that it passes from one to the other without any doubt or hesitation. But below this there are many inferior degrees of evidence and probability, nor does one single contrariety of experiment entirely destroy all our reasoning.
The mind balances the contrary experiments, and, deducting the inferior from the superior, proceeds with that degree of assurance or evidence, which remains. Even when these contrary experiments are entirely equal, we remove not the notion of causes and necessity; but, supposing that the usual contrariety proceeds from the operation of contrary and concealed causes, we conclude, that the chance or indifference lies only in our judgment on account of our imperfect knowledge, not in the things themselves, which are in every case equally necessary, though, to appearance, not equally constant or certain. No union can be more constant and certain than that of some actions with some motives and characters; and if, in other cases, the union is uncertain, 'tis no more than what happens in the operations of body; nor can we conclude any thing from the one irregularity which will not follow equally from the other.
'Tis commonly allowed that madmen have no liberty. But, were we to judge by their actions, these have less regularity and constancy than the actions of wise men, and consequently are farther removed from necessity. Our way of thinking in this particular is, therefore, absolutely inconsistent; but is a natural consequence of these confused ideas and undefined terms, which we so commonly make use of in our reasonings, especially on the present subject.
We must now show, that, as the _union_ betwixt motives and actions has the same constancy as that in any natural operations, so its influence on the understanding is also the same, in _determining_ us to infer the existence of one from that of another. If this shall appear, there is no known circumstance that enters into the connexion and production of the actions of matter that is not to be found in all the operations of the mind; and consequently we cannot, without a manifest absurdity, attribute necessity to the one, and refuse it to the other.
There is no philosopher, whose judgment is so rivetted to this fantastical system of liberty, as not to acknowledge the force of _moral evidence_, and both in speculation and practice proceed upon it as upon a reasonable foundation. Now, moral evidence is nothing but a conclusion concerning the actions of men, derived from the consideration of their motives, temper, and situation. Thus, when we see certain characters or figures described upon paper, we infer that the person who produced them would affirm such facts, the death of Cæsar, the success of Augustus, the cruelty of Nero; and, remembering many other concurrent testimonies, we conclude that those facts were once really existent, and that so many men, without any interest, would never conspire to deceive us; especially since they must, in the attempt, expose themselves to the derision of all their contemporaries, when these facts were asserted to be recent and universally known. The same kind of reasoning runs through politics, war, commerce, economy, and indeed mixes itself so entirely in human life, that 'tis impossible to act or subsist a moment without having recourse to it. A prince who imposes a tax upon his subjects, expects their compliance. A general who conducts an army, makes account of a certain degree of courage. A merchant looks for fidelity and skill in his factor or supercargo. A man who gives orders for his dinner, doubts not of the obedience of his servants. In short, as nothing more nearly interests us than our own actions and those of others, the greatest part of our reasonings is employed in judgments concerning them. Now I assert, that whoever reasons after this manner, does _ipso facto_ believe the actions of the will to arise from necessity, and that he knows not what he means when he denies it.
All those objects, of which we call the one _cause_ and the other _effect_, considered in themselves, are as distinct and separate from each other as any two things in nature; nor can we ever, by the most accurate survey of them, infer the existence of the one from that of the other. 'Tis only from experience and the observation of their constant union, that we are able to form this inference; and even after all, the inference is nothing but the effects of custom on the imagination. We must not here be content with saying, that the idea of cause and effect arises from objects constantly united; but must affirm, that 'tis the very same with the idea of these objects, and that the _necessary connexion_ is not discovered by a conclusion of the understanding, but is merely a perception of the mind. Wherever, therefore, we observe the same union, and wherever the union operates in the same manner upon the belief and opinion, we have the idea of causes and necessity, though perhaps we may avoid those expressions.
Motion in one body, in all past instances that have fallen under our observation, is followed upon impulse by motion in another. 'Tis impossible for the mind to penetrate farther. From this constant union it _forms_ the idea of cause and effect, and by its influence _feels_ the necessity. As there is the same constancy, and the same influence, in what we call moral evidence, I ask no more. What remains can only be a dispute of words.
And indeed, when we consider how aptly _natural_ and _moral_ evidence cement together, and form only one chain of argument betwixt them, we shall make no scruple to allow, that they are of the same nature, and derived from the same principles. A prisoner, who has neither money nor interest, discover the impossibility of his escape, as well from the obstinacy of the gaoler, as from the walls and bars with which he is surrounded; and in all attempts for his freedom, chooses rather to work upon the stone and iron of the one, than upon the inflexible nature of the other. The same prisoner, when conducted to the scaffold, foresees his death as certainly from the constancy and fidelity of his guards, as from the operation of the axe or wheel. His mind runs along a certain train of ideas: the refusal of the soldiers to consent to his escape; the action of the executioner; the separation of the head and body, bleeding, convulsive motions, and death. Here is a connected chain of natural causes and voluntary actions; but the mind feels no difference betwixt them in passing from one link to another; nor is less certain of the future event than if it were connected with the present impressions of the memory and senses by a train of causes cemented together by what we are pleased to call a _physical necessity_. The same experienced union has the same effect on the mind, whether the united objects be motives, volitions and actions, or figure and motion. We may change the names of things, but their nature and their operation on the understanding never change.
I dare be positive no one will ever endeavour to refute these reasonings otherwise than by altering my definitions, and assigning a different meaning to the terms of _cause, and effect, and necessity, and liberty, and chance_. According to my definitions, necessity makes an essential part of causation; and consequently liberty, by removing necessity, removes also causes, and is the very same thing with chance.
As chance is commonly thought to imply a contradiction, and is at least directly contrary to experience, there are always the same arguments against liberty or free-will. If any one alters the definitions, I cannot pretend to argue with him till I know the meaning he assigns to these terms.
SECTION II.
THE SAME SUBJECT CONTINUED.
I believe we may assign the three following reasons for the prevalence of the doctrine of liberty, however absurd it may be in one sense, and unintelligible in any other. First, after we have performed any action, though we confess we were influenced by particular views and motives, 'tis difficult for us to persuade ourselves we were governed by necessity, and that 'twas utterly impossible for us to have acted otherwise, the idea of necessity seeming to imply something of force, and violence, and constraint, of which we are not sensible. Few are capable of distinguishing betwixt the liberty of _spontaneity_, as it is called in the schools, and the liberty of _indifference_; betwixt that which is opposed to violence, and that which means a negation of necessity and causes. The first is even the most common sense of the word; and as 'tis only that species of liberty which it concerns us to preserve, our thoughts have been principally turned towards it, and have almost universally confounded it with the other.
Secondly, there is a _false sensation or experience_ even of the liberty of indifference, which is regarded as an argument for its real existence. The necessity of any action, whether of matter or of the mind, is not properly a quality in the agent, but in any thinking or intelligent being, who may consider the action, and consists in the determination of his thought to infer its existence from some preceding objects: as liberty or chance, on the other hand, is nothing but the want of that determination, and a certain looseness, which we feel in passing or not passing from the idea of one to that of the other.
Now, we may observe, that though in reflecting on human actions, we seldom feel such a looseness or indifference, yet it very commonly happens, that, in performing the actions themselves, we are sensible of something like it: and as all related or resembling objects are readily taken for each other, this has been employed as a demonstrative, or even an intuitive proof of human liberty. We feel that our actions are subject to our will on most occasions, and imagine we feel that the will itself is subject to nothing; because when, by a denial of it, we are provoked to try, we feel that it moves easily every way, and produces an image of itself even on that side on which it did not settle. This image or faint motion, we persuade ourselves, could have been completed into the thing itself; because, should that be denied, we find, upon a second trial, that it can. But these efforts are all in vain; and whatever capricious and irregular actions we may perform, as the desire of showing our liberty is the sole motive of our actions, we can never free ourselves from the bonds of necessity. We may imagine we feel a liberty within ourselves, but a spectator can commonly infer our actions from our motives and character; and even where he cannot, he concludes in general that he might, were he perfectly acquainted with every circumstance of our situation and temper, and the most secret springs of our complexion and disposition. Now, this is the very essence of necessity, according to the foregoing doctrine.
A third reason why the doctrine of liberty has generally been better received in the world than its antagonist, proceeds from _religion_, which has been very unnecessarily interested in this question. There is no method of reasoning more common, and yet none more blameable, than in philosophical debates to endeavour to refute any hypothesis by a pretext of its dangerous consequences to religion and morality.
When any opinion leads us into absurdities, 'tis certainly false; but 'tis not certain an opinion is false, because 'tis of dangerous consequence. Such topics, therefore, ought entirely to be foreborn, as serving nothing to the discovery of truth, but only to make the person of an antagonist odious. This I observe in general, without pretending to draw any advantage from it. I submit myself frankly to an examination of this kind, and dare venture to affirm, that the doctrine of necessity, according to my explication of it, is not only innocent, but even advantageous to religion and morality.
I define necessity two ways, conformable to the two definitions of _cause_, of which it makes an essential part. I place it either in the constant union and conjunction of like objects, or in the inference of the mind from the one to the other. Now, necessity, in both these senses, has universally, though tacitly, in the schools, in the pulpit, and in common life, been allowed to belong to the will of man; and no one has ever pretended to deny, that we can draw inferences concerning human actions, and that those inferences are founded on the experienced union of like actions with like motives and circumstances. The only particular in which any one can differ from me is, either that perhaps he will refuse to call this necessity; but as long as the meaning is understood, I hope the word can do no harm; or, that he will maintain there is something else in the operations of matter. Now, whether it be so or not, is of no consequence to religion, whatever it may be to natural philosophy. I may be mistaken in asserting, that we have no idea of any other connexion in the actions of body, and shall be glad to be farther instructed on that head: but sure I am, I ascribe nothing to the actions of the mind, but what must readily be allowed of. Let no one, therefore, put an invidious construction on my words, by saying simply, that I assert the necessity of human actions, and place them on the same footing with the operations of senseless matter. I do not ascribe to the will that unintelligible necessity, which is supposed to lie in matter. But I ascribe to matter that intelligible quality, call it necessity or not, which the most rigorous orthodoxy does or must allow to belong to the will. I change, therefore, nothing in the received systems, with regard to the will, but only with regard to material objects.
Nay, I shall go farther, and assert, that this kind of necessity is so essential to religion and morality, that without it there must ensue an absolute subversion of both, and that every other supposition is entirely destructive to all laws, both _divine_ and _human_. 'Tis indeed certain, that as all human laws are founded on rewards and punishments, 'tis supposed as a fundamental principle, that these motives have an influence on the mind, and both produce the good and prevent the evil actions. We may give to this influence what name we please; but as 'tis usually conjoined with the action, common sense requires it should be esteemed a cause, and be looked upon as an instance of that necessity, which I would establish.
This reasoning is equally solid, when applied to _divine_ laws, so far as the Deity is considered as a legislator, and is supposed to inflict punishment and bestow rewards with a design to produce obedience. But I also maintain, that even where he acts not in his magisterial capacity, is regarded as the avenger of crimes merely on account of their odiousness and deformity, not only 'tis impossible, without the necessary connexion of cause and effect in human actions, that punishments could be inflicted compatible with justice and moral equity; but also that it could ever enter into the thoughts of any reasonable being to inflict them. The constant and universal object of hatred or anger is a person or creature endowed with thought and consciousness; and when any criminal or injurious actions excite that passion, 'tis only by their relation to the person or connexion with him. But according to the doctrine of liberty or chance, this connexion is reduced to nothing, nor are men more accountable for those actions, which are designed and premeditated, than for such as are the most casual and accidental. Actions are, by their very nature, temporary and perishing; and where they proceed not from some cause in the characters and disposition of the person who performed them, they infix not themselves upon him, and can neither redound to his honour, if good, nor infamy, if evil. The action itself may be blameable; it may be contrary to all the rules of morality and religion: but the person is not responsible for it; and as it proceeded from nothing in him that is durable or constant, and leaves nothing of that nature behind it, 'tis impossible he can, upon its account, become the object of punishment or vengeance. According to the hypothesis of liberty, therefore, a man is as pure and untainted, after having committed the most horrid crimes, as at the first moment of his birth, nor is his character any way concerned in his actions, since they are not derived from it, and the wickedness of the one can never be used as a proof of the depravity of the other. 'Tis only upon the principles of necessity, that a person acquires any merit or demerit from his actions, however the common opinion may incline to the contrary.
But so inconsistent are men with themselves, that though they often assert that necessity utterly destroys all merit and demerit either towards mankind or superior powers, yet they continue still to reason upon these very principles of necessity in all their judgments concerning this matter. Men are not blamed for such evil actions as they perform ignorantly and casually, whatever may be their consequences. Why? but because the causes of these actions are only momentary, and terminate in them alone. Men are less blamed for such evil actions as they perform hastily and unpremeditately, than for such as proceed from thought and deliberation. For what reason? but because a hasty temper, though a constant cause in the mind, operates only by intervals, and infects not the whole character. Again, repentance wipes off every crime, especially if attended with an evident reformation of life and manners. How is this to be accounted for? but by asserting that actions render a person criminal, merely as they are proofs of criminal passions or principles in the mind; and when, by any alteration of these principles, they cease to be just proofs, they likewise cease to be criminal. But according the doctrine of _liberty_ or _chance_, they never were just proofs, and consequently never were criminal.
Here then I turn to my adversary, and desire him to free his own system from these odious consequences before he charge them upon others.
Or, if he rather chooses that this question should be decided by fair arguments before philosophers, than by declamations before the people, let him return to what I have advanced to prove that liberty and chance are synonymous; and concerning the nature of moral evidence and the regularity of human actions. Upon a review of these reasonings, I cannot doubt of an entire victory; and therefore, having proved that all actions of the will have particular causes, I proceed to explain what these causes are, and how they operate.
SECTION III.
OF THE INFLUENCING MOTIVES OF THE WILL.
Nothing is more usual in philosophy, and even in common life, than to talk of the combat of passion and reason, to give the preference to reason, and assert that men are only so far virtuous as they conform themselves to its dictates. Every rational creature, 'tis said, is obliged to regulate his actions by reason; and if any other motive or principle challenge the direction of his conduct, he ought to oppose it, 'till it be entirely subdued, or at least brought to a conformity with that superior principle. On this method of thinking the greatest part of moral philosophy, ancient and modern, seems to be founded; nor is there an ampler field, as well for metaphysical arguments, as popular declamations, than this supposed pre-eminence of reason above passion. The eternity, invariableness, and divine origin of the former, have been displayed to the best advantage: the blindness, inconstancy, and deceitfulness of the latter, have been as strongly insisted on. In order to show the fallacy of all this philosophy, I shall endeavour to prove _first_, that reason alone can never be a motive to any action of the will; and _secondly_, that it can never oppose passion in the direction of the will.
The understanding exerts itself after two different ways, as the judges from demonstration or probability; as it regards the abstract relations of our ideas, or those relations of objects of which experience only gives us information. I believe it scarce will be asserted, that the first species of reasoning alone is ever the cause of any action. As