that can cause such terrible Symptomes, how unreasonable, how Childish it is for any one to object against the Use of Exercise, because of the common and (in comparison of Sea-sickness) trivial inconveniencies which must be born in the first Tryals! Some strong People shall be confounded with a very few Glasses of Wine; and yet if those very People fall to keeping of Company, and addict themselves to Wine but a little while, they shall drink vast quantities without any Disorder. The first Pipe of Tabacco disturbs Nature to the utmost, but after two or three more, she becomes pleas’d with that, which before disturb’d her. In the Animal Oeconomy, every thing is so wonderfully contriv’d, and made to conspire for the Preservation of Life, that Nature can adapt her self to all Circumstances; she can expand her self to bear the Luxury of a Palace, and contract her self to the short Allowance, the Bread and Water of a Prison; she can be easie under a Bloated Habit of Body, and she can make a shift to suit her self to the Expence of Fluxes and other Evacuations; accustoming her self so to bear ’em, that the longer they last, they may be in some Proportion the more familiar. But above all, she, with the most Ease, accustoms her self to the Use of Exercise; she may be said to delight her self in that, it being in a manner, _de Essentiâ Naturiæ_, and therefore it is in vain, when Exercise is really necessary, for a Person to complain after the first Tryal, and say, I’m tyr’d, my Bones are sore, my Head akes, I’m ready to faint, or the like; for all this must be endur’d, and upon patiently repeating the Motion, tho’ no Abatement appear for some Days, yet the Reward will come At last: and as these Symptomes go off, the strength of the sick Person will encrease. From these Considerations I think it sufficiently appears, that what I have before hinted, is not at all unlikely, _viz._ That in some Cases, a distemper’d Person may acquire, by suitable Exercise habitually us’d, a degree of Strength, as much greater, than that of other sick People in the same Circumstances, who wholly neglect all Exercise, as the Strength and Agility of Robust Men, bred up to Violent Motions, is greater than the Strength of other People, who tho’ Healthy, yet are not us’d to such Things, and therefore incomparably Weaker.