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But beside the action of the mind, which is the principal foundation of the pleasure, there is likewise required a degree of success in the attainment of the end, or the discovery of that truth we examine. Upon this head I shall make a general remark, which may be useful on many occasions, viz. that where the mind pursues any end with passion, though that passion be not derived originally from the end, but merely from the action and pursuit, yet, by the natural course of the affections, we acquire a concern for the end itself, and are uneasy under any disappointment we meet with in the pursuit of it. This proceeds from the relation and parallel direction of the passions above-mentioned.
To illustrate all this by a similar instance, I shall observe, that there cannot be two passions more nearly[Pg 212] resembling each other than those of hunting and philosophy, whatever disproportion may at first sight appear betwixt them. 'Tis evident, that the pleasure of hunting consists in the action of the mind and body; the motion, the attention, the difficulty, and the uncertainty. 'Tis evident, likewise, that these actions must be attended with an idea of utility, in order to their having any effect upon us. A man of the greatest fortune, and the farthest removed from avarice, though he takes a pleasure in hunting after partridges and pheasants, feels no satisfaction in shooting crows and magpies; and that because he considers the first as fit for the table, and the other as entirely useless. Here 'tis certain, that the utility or importance of itself causes no real passion, but is only requisite to support the imagination; and the same person who overlooks a ten times greater profit in any other subject, is pleased to bring home half a dozen woodcocks or plovers, after having employed several hours in hunting after them. To make the parallel betwixt hunting and philosophy more complete, we may observe, that though in both cases the end of our action may in itself be despised, yet, in the heat of the action, we acquire such an attention to this end, that we are very uneasy under any disappointments, and are sorry when we either miss our game, or fall into any error in our reasoning.
If we want another parallel to these affections, we may consider the passion of gaming, which affords a pleasure from the same principles as hunting and philosophy. It has been remarked, that the pleasure of gaming arises not from interest alone, since many leave a sure gain for this entertainment; neither is it derived[Pg 213] from the game alone, since the same persons have no satisfaction when they play for nothing; but proceeds from both these causes united, though separately they have no effect. 'Tis here, as in certain chemical preparations, where the mixture of two clear and transparent liquids produces a third, which is opaque and coloured.
The interest which we have in any game engages our attention, without which we can have no enjoyment, either in that or in any other action. Our attention being once engaged, the difficulty, variety, and sudden reverses of fortune; still farther interest us; and 'tis from that concern our satisfaction arises. Human life is so tiresome a scene, and men generally are of such indolent dispositions, that whatever amuses them, though by a passion mixed with pain, does in the main give them a sensible pleasure. And this pleasure is here increased by the nature of the objects, which, being sensible and of a narrow compass, are entered into with facility, and are agreeable to the imagination.
The same theory that accounts for the love of truth in mathematics and algebra, may be extended to morals, politics, natural philosophy, and other studies, where we consider not the abstract relations of ideas, but their real connexions and existence. But beside the love of knowledge which displays itself in the sciences, there is a certain curiosity implanted in human nature, which is a passion derived from a quite different principle. Some people have an insatiable desire of knowing the actions and circumstances of their neighbours, though their interest be no way concerned in them, and they must entirely depend on others[Pg 214] for their information; in which case there is no room for study or application. Let us search for the reason of this phenomenon.
It has been proved at large, that the influence of belief is at once to enliven and infix any idea in the imagination, and prevent all kind of hesitation and uncertainty about it. Both these circumstances are advantageous. By the vivacity of the idea we interest the fancy, and produce, though in a lesser degree, the same pleasure which arises from a moderate passion. As the vivacity of the idea gives pleasure, so its certainty prevents uneasiness, by fixing one particular idea in the mind, and keeping it from wavering in the choice of its objects. 'Tis a quality of human nature which is conspicuous on many occasions, and is common both to the mind and body, that too sudden and violent a change is unpleasant to us, and that, however any objects may in themselves be indifferent, yet their alteration gives uneasiness. As 'tis the nature of doubt to cause a variation in the thought, and transport us suddenly from one idea to another, it must of consequence be the occasion of pain. This pain chiefly takes place where interest, relation, or the greatness and novelty of any event interests us in it. 'Tis not every matter of fact of which we have a curiosity to be informed; neither are they such only as we have an interest to know. 'Tis sufficient if the idea strikes on us with such force, and concerns us so nearly, as to give us an uneasiness in its instability and inconstancy. A stranger, when he arrives first at any town, may be entirely indifferent about knowing the history and adventures of the inhabitants; but as he becomes farther acquainted with them, and has lived any considerable[Pg 215] time among them, he acquires the same curiosity as the natives. When we are reading the history of a nation, we may have an ardent desire of clearing up any doubt or difficulty that occurs in it; but become careless in such researches, when the ideas of these events are, in a great measure, obliterated.
There is an inconvenience which attends all abstruse reasoning, that it may silence, without convincing an antagonist, and requires the same intense study to make us sensible of its force, that was at first requisite for its invention. When we leave our closet, and engage in the common affairs of life, its conclusions seem to vanish like the phantoms of the night on the appearance of the morning; and 'tis difficult for us to retain even that conviction which we had attained with difficulty. This is still more conspicuous in a long chain of reasoning, where we must preserve to the end the evidence of the first propositions, and where we often lose sight of all the most received maxims, either of philosophy or common life. I am not, however, without hopes, that the present system of philosophy will acquire new force as it advances; and that our reasonings concerning morals will corroborate whatever has been said concerning the understanding and the passions. Morality is a subject that interests us above all others; we fancy the peace of society to be at stake in every decision concerning it; and 'tis evident, that this concern must make our speculations appear more real and solid, than where the subject is in a great measure indifferent to us. What affects us, we conclude can never be a chimera; and, as our passion is engaged[Pg 220] on the one side or the other, we naturally think that the question lies within human comprehension; which, in other cases of this nature, we are apt to entertain some doubt of. Without this advantage, I never should have ventured upon a third volume of such abstruse philosophy, in an age wherein the greatest part of men seem agreed to convert reading into an amusement, and to reject every thing that requires any considerable degree of attention to be comprehended.
