Juices, and Poisons become Beneficial, when oppos’d to certain Humours, why should we not then allow of the same Rule, in the Containing Parts of the Body? If by a Supine Course of Life, the Nervous parts are weakned and relax’d, why should we not suppose the contrary way of Living, the most likely to repair ’em? Since the Vigour of those parts is acquir’d by Use; they are the Active part of the Man, and not always liable to the Impressions of the Fluids, for tho’ you invigorate the Blood ever so much by the most generous Medicines, the Nerves may remain Effete and Languid notwithstanding; but if the Nervous parts are extended and exercis’d, the Blood and the Humours must necessarily partake of the Benefit, and soon discover it by the Increase of their Heat and Motion. There is so much of a Relative Nature in every thing, that can concern the Health or Distemperature of the Individual, that there is scarce any thing so prejudicial, or seemingly Absurd, but may in different Circumstances prove as Advantageous. The World has lately had full Evidence of the good Effects of an Intense Cold, equally apply’d to all the Parts of the Body at once, which Method of Curing would, not many Years agoe, have been thought very Extravagant, and certainly Destructive. On the contrary, there are other Cases, where a Warm Bath is only prevalent; and though some People have suppos’d it to be only a kind of a last Resort, when other things have been try’d in Vain, yet it is quite otherwise, it being impossible to remove some Diseases of the Limbs, without an universal equal Relaxation. Again, quite different from this is the equal Distribution of a greater Degree of Heat throughout the whole Body, which is procur’d by Habitual Exercise; in the former Method, the Parts are relax’d, in this they are strengthned, and in every Respect the Effects are widely different, tho’ in both ways there is a considerable Encrease of Heat. But to carry this enquiry farther, there are some Distempers, and those not altogether so rare neither, in the Cure of which no Positive Physick of any sort whatsoever, can be serviceable, nothing but a gradual Substraction of the Cause, an Alterative abstinence, if I may so speak, being necessary; as there have been some Gouts in some temperate Persons, of a strong and rank Constitution, which nothing could remove but a very low Diet, and an entire Abstinence from Flesh; to them Flesh being as Wine is to others, who Contract that Distemper by their Excess: and the same Observation holds good likewise in the ~Opthalmia~, and some other Cases of the Eyes, as any that will duly weigh the Circumstances of some Persons often subject to ’em, will find Reason to believe, so that some Men are by their Constitutions condemn’d to an Antidiluvian Diet of Roots and Vegetables, or else to suffer worse Inconveniences; and when those happen, it is absurd to expect, by the most Celebrated Remedy to cure the Disease, when the Cause continues.