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t, there is another very specific quality that distinguishes them, and a quality which will admit of no dispute; this is the faculty of improvement; a faculty which, as circumstances offer, successively unfolds all the other faculties, and resides among us not only in the species, but in the individuals that compose it; whereas a beast is, at the end of some months, all he ever will be during the rest of his life; and his species, at the end of a thousand years, precisely what it was the first year of that long period. Why is man alone subject to dotage? Is it not, because he thus returns to his primitive condition? And because, while the beast, which has acquired nothing and has likewise nothing to lose, continues always in possession of his instinct, man, losing by old age, or by accident, all the acquisitions he had made in consequence of his perfectibility, thus falls back even lower than beasts themselves? It would be a melancholy necessity for us to be obliged to allow, that this distinctive and almost unlimited faculty is the source of all man's misfortunes; that it is this faculty, which, though by slow degrees, draws them out of their original condition, in which his days would

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