Moreover the language of fiction is not required to maintain the self-evident testimonies of facts.
As true as truth’s simplicity,
And simpler than the infancy of truth.
Whereas false doctrines and fallacious opinions need all the aid of imagination’s vivid colours to disguise their real form with a goodly outside. We may in general conclude that enthusiasts are at first deceived themselves to become in turn deceivers. Seldom does man display sufficient humility to admit that he has erred in his favourite doctrines, and how much less will he be disposed to confess his deviation from rectitude, when imposture becomes the source of wealth and power, and hypocrisy a trade: to the ghostly speculator we may well apply the lines of Massinger:
Oh, now your hearts make ladders of your eyes,
In show to climb to heaven, where your devotion
Walks upon crutches.
It is, however, fortunate that errors generally assist the development of truth. The progress of the Christian faith was materially forwarded by the absurdities and fallacies of all other religions; and Helvetius has truly observed that if we could for a moment doubt the truth of Christianity, its divine origin would be proved by its having survived the horrors of popery. False theories led Columbus to correct geographic conclusions, and Galileo’s discoveries overthrew his own former theories.
MEDICINAL EFFECTS OF WATER.
Amongst the various means resorted to by quackery to speculate upon the credulity of mankind, simple river or spring water, coloured and flavoured with inert substances, has not been the least productive; and many a time the Thames and Seine have been fertile sources of supposed invaluable medicines. Sangrado’s doctrines on aqueous potations have long prevailed in the profession; and it has been stoutly maintained that a water diet can cure the gout and various other diseases. That relief, if not cures, have been obtained by this practice, there cannot be the least doubt. Are we to attribute these favourable results to the effects of the imagination, the beneficial efforts of nature, or the salutary abstinence which this prescription imposed? Possibly they all combined to assist the physician’s efforts, or rather aid his effete treatment. Cold water and warm water have in turn been praised to the very skies by their eulogists, and become the subject of ridicule and persecution on the part of more spirited practitioners.
In surgery, water has ever been considered of great utility; it, no doubt, was instinctively used by man to cleanse and heal his wounds. Patroclus, having extracted the dart from his friend Eurypylus, washes the wound; and the prophet Elisha prescribes to Naaman the waters of Jordan. Rivers had various qualities, and were supposed to prove as different in their action on the economy as the mineral springs which from time immemorial, have been resorted to. These effects may in fact not be altogether doubtful; for, although these salutary streams may not possess sufficient active ingredients to be recognised by chemical tests, yet we know that substances which appear perfectly inert may prove highly active and effectual when combined and diluted naturally or artificially. Moreover, in the effects of watering-places on the invalid or valetudinarian, we must not forget the powerful influence of change of air and habit, the invigorating stimulus of hope, and the diversion from former occupations. To these auxiliaries many a remedy has owed its high reputation; and probably when Wesley attributed his recovery to brimstone and supplication, he in a great measure might have considered rest from incessant labour the chief agent in his relief. The exhilarating effects of the picturesque site of many of these salutary places of resort is universally acknowledged. Montaigne, Voltaire, Alfieri, acknowledged their influence on the imagination. Petrarch’s inspirations flowed with the waters of Vaucluse, some of Sevigné’s most delightful letters were written at Vichy, and Genlis and Staël were particularly happy in their epistolary elegance at Spa and Baden.
We owe to accident many valuable discoveries in medicine. It is said that several Indians, having used the waters of a lake in which a cinchona tree was growing, experienced the benefit which led to the use of the Peruvian bark; and the thermal properties of the baths of Carlsbad were first made known by the howling of one of Charles the Fourth’s hounds, that had fallen in them in a hunt. It has been also observed, in various countries, that particular waters produced various morbid affections; and to this cause have been attributed goitres, cretinism, calculi, and other distressing diseases. The ancients dreaded the impurity of their rivers. The Romans boiled their water in extensive thermopolia, where not only potations were drunk hot, but occasionally refrigerated with ice and snow, and, when thus prepared, called decocta. Juvenal and Martial refer this custom to the Greeks. Herodotus informs us that the Persian monarchs were accompanied on their expeditions by chariots laden with silver vases filled with the water of the Choaspes that had been boiled, and which was solely destined for the king’s use: Athenæus tells us that it was light and sweet. Many ancient coins and inscriptions have recorded these salutary properties of certain waters.