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tor。 It is thus quite certain that the constitution of the true religion； the ordinances of which are derived from God； must be incomparably superior to that of every other。 And； to speak of human affairs； I believe that the pre…eminence of Sparta was due not to the goodness of each of its laws in particular； for many of these were very strange； and even opposed to good morals； but to the circumstance that； originated by a single individual； they all tended to a single end。 In the same way I thought that the sciences contained in books （such of them at least as are made up of probable reasonings； without demonstrations）； composed as they are of the opinions of many different individuals massed together； are farther removed from truth than the simple inferences which a man of good sense using his natural and unprejudiced judgment draws respecting the matters of his experience。 And because we have all to pass through a state of infancy to manhood； and have been of necessity； for a length of time； governed by our desires and preceptors （whose dictates were frequently conflicting； while neither perhaps always counseled us for the best）； I farther concluded that it is almost impossible that our judgments can be so correct or solid as they would have been； had our reason been mature from the moment of our birth； and had we always been guided by it alone。
It is true； however； that it is not customary to pull down all the houses of a town with the single design of rebuilding them differently； and thereby rendering the streets more handsome； but it often happens that a private individual takes down his own with the view of erecting it anew； and that people are even sometimes constrained to this when their houses are in danger of falling from age； or when the foundations are insecure。 With this before me by way of example； I was persuaded that it would indeed be preposterous for a private individual to think of reforming a state by fundamentally changing it throughout； and overturning it in order to set it up amended； and the same I thought was true of any similar project for reforming the body of the sciences； or the order of teaching them established in the schools： but as for the opinions which up to that time I had embraced； I thought that I could not do better than resolve at once to sweep them wholly away； that I might afterwards be in a position to admit either others more correct； or even perhaps the same when they had undergone the scrutiny of reason。 I firmly believed that in this way I
should much better succeed in the conduct of my life； than if I built only upon old foundations； and leaned upon principles which； in my youth； I had taken upon trust。 For although I recognized various difficulties in this undertaking； these were not； however； without remedy； nor once to be compared with such as attend the slightest reformation in public affairs。 Large bodies； if once overthrown； are with great difficulty set up again； or even kept erect when once seriously shaken； and the fall of such is always disastrous。 Then if there are any imperfections in the constitutions of states （and that many such exist the diversity of constitutions is alone sufficient to assure us）； custom has without doubt materially smoothed their inconveniences； and has even managed to steer altogether clear of； or insensibly corrected a number which sagacity could not have provided against with equal effect； and； in fine； the defects are almost always more tolerable than the change necessary for their removal； in the same manner that highways which wind among mountains； by being much frequented； become gradually so smooth and commodious； that it is much better to follow them than to seek a straighter path by climbing over the tops of rocks and descending to the bottoms of precipices。
Hence it is that I cannot in any degree approve of those restless and busy meddlers who； called neither by birth nor fortune to take part in the management of public affairs； are yet always projecting reforms； and if I thought that this tract contained aught which might justify the suspicion that I was a victim of such folly； I would by no means permit its publication。 I have never contemplated anything higher than the reformation of my own opinions； and basing them on a foundation wholly my own。 And although my own satisfaction with my work has led me to present here a draft of it； I do not by any means therefore recommend to every one else to make a similar attempt。 Those whom God has endowed with a larger measure of genius will entertain； perhaps； designs still more exalted； but for the many I am much afraid lest even the present undertaking be more than they can safely venture to imitate。 The single design to strip one's self of all past beliefs is one that ought not to be taken by every one。 The majority of men is composed of two classes； for neither of which would this be at all a befitting resolution： in the first place； of those who with more than a due confidence in their own powers； are precipitate in their judgments and want the patience requisite for orderly and circumspect thinking； whence it happens； that if men of this class once take the liberty to doubt of their accustomed opinions； and quit the beaten highway； they will never be able to thread the byway that would lead them by a shorter course； and will lose themselves and continue to wander for life； in the second place； of those who； possessed of sufficient sense or modesty to determine that there are others who excel them in the power of discriminating between truth and error； and by whom they may be instructed； ought rather to content themselves with the opinions of such than trust for more correct to their own reason。
For my own part； I should doubtless have belonged to the latter class； had I received instruction from but one master； or had I never known the diversities of opinion that from time immemorial have prevailed among men of the greatest learning。 But I had become aware； even so early as during my college life； that no opinion； however absurd and incredible； can be imagined； which has not been maintained by some on of the philosophers； and afterwards in the course of my travels I remarked that all those whose opinions are decidedly repugnant to ours are not in that account barbarians and savages； but on the contrary that many of these nations make an equally good； if not better； use of their reason than we do。 I took into account also the very different character which a person brought up from infancy in France or Germany exhibits； from that which； with the same mind originally； this individual would have possessed had he lived always among the Chinese or with savages； and the circumstance that in dress itself the fashion which pleased us ten years ago； and which may again； perhaps； be received into favor before ten years have gone； appears to us at this moment extravagant and ridiculous。 I was thus led to infer that the ground of our opinions is far more custom and example than any certain knowledge。 And； finally； although such be the ground of our opinions； I remarked that a plurality of suffrages is no guarantee of truth where it is at all of difficult discovery； as in such cases it is much more likely that it will be found by one than by many。 I could； however； select from the crowd no one whose opinions seemed worthy of preference； and thus I found myself constrained； as it were； to use my own reason in the conduct of my life。
But like one walking alone and in the dark； I resolved to proceed so slowly and with such circumspection； that if I did not advance far； I would at least guard against falling。 I did not even choose to dismiss summarily any of the opinions that had crept into my belief without having been introduced by reason； but first of all took sufficient time carefully to satisfy myself of the general nature of the task I was setting myself； and ascertain the true method by which to arrive at the knowledge of whatever lay within the compass of my powers。
Among the branches of philosophy； I had； at an earlier period； given some attention to logic； and among those of the mathematics to geometrical analysis and algebra； three arts or sciences which ought； as I conceived； to contribute something to my design。 But； on examination； I found that； as for logic； its syllogisms and the majority of its other precepts are of avail… rather in the communication of what we already know； or even as the art of Lully； in speaking without judgment of things of which we are ignorant； than in the investigation of the unknown； and although this science contains indeed a number of correct and very excellent precepts； there are； nevertheless； so many others； and these either injurious or superfluous； mingled with the former； that it is almost quite as difficult to effect a severance of the true from the false as it is to extract a Diana or a Minerva from a rough block of marble。 Then as to the analysis of the ancients and the algebra of the moderns； besides that they embrace only matters highly abstract； and； to appearance； of no use； the former is so exclusively restricted to the consideration of figures； that it can exercise the understanding only on condition of greatly fatigu