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and compacted together, that the intire system of humanity is formed. These are like so many wheels of the same machine, which combined and managed by a dexterous hand, conspire all to the same end; and, on the contrary, unskilfully directed, embarrass and destroy each other. But how man, in fine, is enabled to conduct himself in this prudent manner, and what rule he is to observe in order to attain this happy end, is what we have still to inquire, and forms the subject of the following chapters.

       CHAPTER V

       That man ought to square his conduct by rule; the method of finding out this rule; and the foundations of right in general.

      Definition of a rule.

      I. Let us begin with an explication of the terms. A rule, in its proper signification, is an instrument, by means of which we draw the shortest <45> line from one point to another, which for this very reason is called a straight line.1

      In a figurative and moral sense, a rule imports nothing else, but a principle, or maxim, which furnishes man with a sure and concise method of attaining to the end he proposes.

      It is not convenient, that man should live without a rule.

      II. The first thing we are to inquire in regard to this subject* is, whether it is really agreeable to the nature of man to submit his actions to a fixt and invariable rule; or whether, on the contrary, he is allowed to abandon himself indifferently to all the motions of his will, and thus to enjoy, without either limit or impediment, the extreme facility with which this faculty turns itself on all sides, in consequence of its natural flexibility.

      The reflexions we have given in the preceding chapters, are of themselves, and independent of any other argument, a sufficient and convincing proof, that the nature and constitution of man requires the establishment of some rule. Every thing in nature has its destination and end; and consequently, each creature is conducted to its end by a proper principle of direction. Man, who holds a considerable rank among the beings that surround him, participates undoubtedly of this fixt and universal order. And whether we consider him in himself as an intelligent and rational being; or view him as a member of society; or whether, in fine, we regard him as the handy-work of God, and deriving from this first being his faculties, state, and existence; all these circumstances<46> evidently indicate an end, a destination, and consequently imply the necessity of a rule. Had man been created to live at random without any fixt and determinate view, without knowing whither he is to direct his course, or what road he ought to take; it is evident that his noblest faculties would be of no manner of use to him. Wherefore waving all disquisitions concerning the necessity of a rule, let us endeavour rather to discover what this rule is, which alone, by enlightening the understanding, and directing our actions to an end worthy of him, is capable of forming the order and beauty of human life.

      A rule supposes an end, an aim.

      III. When we speak of a rule in relation to human actions, two things are manifestly supposed: the first, that human conduct is susceptible of direction, as we have already proved; the second, that man in all his steps and actions proposes to himself a scope or end which he is desirous to attain.

      The ultimate end of man is happiness.

      IV. Now let man reflect but never so little on himself, he will soon perceive that every thing he does is with a view of happiness, and that this is the ultimate end he proposes in all his actions, or the last term to which he reduces them. This is a first truth, of which we have a continual conviction from our own internal sense. Such, in effect, is the nature of man, that he necessarily loves himself, that he seeks in every thing and every where his own advantage, and can never be diverted from this pursuit. We naturally desire, and necessarily wish for good. This desire anticipates all our reflexions, and is not in our own election; it predominates in us, and becomes <47> the primum mobile of all our determinations; our hearts being never inclined towards any particular good, but by the natural impression which determines us to good in general. It is not in our power to change this bent of the will, which the Creator himself has implanted in us.2

      It is the system of providence.

      V. This system of providence extends to all beings endowed with sense and knowledge. Even animals themselves have a like instinct; for they all love themselves, endeavouring at self-preservation by all sorts of means, eagerly pursuing whatever seems good or useful to them, and turning, on the contrary, from whatever appears prejudicial or bad. The same propensity shews itself in man, not only as an instinct, but moreover as a rational inclination approved and strengthened by reflexion. Hence whatsoever presents itself to us as an object proper to promote our happiness, must of necessity please us; and every thing that appears opposite to our felicity, becomes of course the object of our aversion. The more we study man, the more we are convinced that here, in reality, lies the source of all our tastes; here the grand spring which sets us in motion.

      The desire of happiness is essential to man, and inseparable from reason.

      VI. And indeed, if it be natural to every intelligent and rational being, to act always with a fixt view and determinate end; it is no less evident, that this view or end must be ultimately reduced to himself, and consequently to his own advantage and happiness. The desire therefore of happiness is as essential to a man, and as inseparable from his nature, <48> as reason itself; for reason, as the very etymology of the word implies, is nothing more than a calculation and account. To reason, is to calculate, and to draw up an account, after balancing every thing, in order to see on which side the advantage lies. It would therefore imply a contradiction, to suppose a rational being, that could absolutely forego its interest, or be indifferent with regard to its own felicity.3

      Self-love is a principle that has nothing vicious in itself.

      VII. We must therefore take care not to consider self-love, and that sense or inclination which fixes us so strongly to our happiness, as a principle naturally vicious, and the fruit of human depravation. This would be accusing the author of our existence, and converting his noblest gifts into poison. Whatever comes from a being supremely perfect, is in itself good; and were we to condemn the sense or inclination of self-love as bad in itself, under a pretence that by a misconstruction and wrong use thereof it is the source of an infinite number of disorders, we should for the very same motives be obliged to condemn reason; because it is from the abuse of this faculty that the grossest errors and most extravagant irregularities of men proceed.4

      It may appear surprizing to some that we should have stopt here, to investigate and explain the truth of a principle, which one would imagine is obvious to every body, to the learned as well as the vulgar. And yet it was absolutely necessary; because this is a truth of the very last importance, which gives us the key, as it were, of the human system. It is true, that all ethic writers agree that man is made for happiness, and naturally desires it (for how is it <49> possible not to hear the voice of nature,5 which rises from the very bottom of the heart?). But a great many, after acknowledging this principle, seem to lose sight of it, and not attending to the consequences that flow from thence, they erect their systems on different, and sometimes quite opposite foundations.

      Man cannot attain to happiness but by the help of reason.

      VIII. But if it be true that man does nothing but with a view of happiness, it is no less certain that reason is the only way he has to attain it.

      In order to establish this second proposition or truth, we have only to attend to the very idea of happiness, and to the notion we have of good and evil. Happiness is that internal satisfaction of the soul which arises from the possession of good; good is whatever is agreeable to man for his preservation, perfection, entertainment, and pleasure. Evil is the opposite of good.

      Man incessantly experiences, that there are some things convenient, and others inconvenient to him; that the former are not all equally convenient, but some more than others; in fine, that this conveniency depends, for the most part, on the use he knows how to make of things, and that the same thing which may suit him, using it after a certain manner

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