Nevertheless, a deliberate study of nature is sufficient to undeceive every man who will calmly consider things: he will discover that the phenomena of the world is connected by links, invisible to superficial notice, equally concealed from the too impetuous observer, but extremely intelligible to him who views her with serenity. He will find that the most unusual, the most marvellous, as well as the most trifling, or ordinary effects, are equally inexplicable, but that they all equally flow from natural causes; that supernatural causes, under whatever name they way be designated, with whatever qualities they may be decorated, will never do more than increase difficulties; will only make chimeras multiply. The simplest observation will incontestibly prove to him that every thing is necessary; that all the effects he perceives are material; that they can only originate in causes of the same nature, when he even shall not be able to recur to them by the assistance of his senses. Thus his mind, properly directed, every where show him nothing but matter, sometimes acting in a manner which his organs permit him to follow, at others in a mode imperceptible by the faculties he possesses: he will see that all beings follow constant invariable laws, by which all combinations are united and destroyed; he will find that all forms change, but that, nevertheless, the great whole ever remains the same. Thus, cured of the idle notions with which he was imbued, undeceived in those erroneous ideas, which from habit be attached to imaginary systems, he will cheerfully consent to be ignorant of whatever his organs do not enable him to compass; he will know that obscure terms, devoid of sense, are not calculated to explain difficulties; guided by reason, he will throw aside all hypothesis of the imagination; the champion of rectitude, he will attach himself to realities, which are confirmed by experience, which are evidenced by truth.