and faithful Servant.
[1] In his Promises, Column. 3.
[XXIX.]
MADAM
I am of your Authors mind, That heat is not the cause of digestion; but I dissent from him, when he says, That it is the Ferment of the stomach that doth cause it: For, in my opinion, Digestion is onely made by regular digestive motions, and ill digestion is caused by irregular motions, and when those motions are weak, then there is no digestion at all, but what was received, remains unaltered; but when they are strong and quick, then they make a speedy digestion. You may ask me, what are digestive motions? I answer, They are transchanging, or transforming motions: but since there be many sorts of transchanging motions, digestive motions are those, which transchange food into the nourishment of the body, and dispose properly, fitly and usefully of all the Parts of the food, as well of those which are converted into nourishment, as of those which are cast forth. For give me leave to tell you, Madam, that some parts of natural Matter, do force or cause other parts of Matter to move and work according to their will, without any change or alteration of their parts; as for example, Fire and Metal; for Fire will cause Metal to flow, but it doth not readily alter it from its nature of being Metal; neither doth Fire alter its nature from being Fire. And again, some parts of Matter will cause other parts to work and act to their own will, by forcing these over-powred parts to alter their own natural motions into the motions of the victorious Party, and so transforming them wholly into their own Figure; as for example, Fire will cause Wood to move so as to take its figure, to wit, the figure of Fire, that is, to change its own figurative motions into the motions of Fire: and this latter kind of moving or working is found in digestion; for the regular digestive motions do turn all food received from its own nature or figure, into the nourishment, figure, or nature of the body, as into flesh, blood, bones, and the like. But when several parts of Matter meet or joyn with equal force and power, then their several natural motions are either quite altered, or partly mixt: As for example; some received things not agreeing with the natural constitution of the body, the corporeal motions of the received, and those of the receiver, do dispute or oppose each other: for the motions of the received, not willing to change their nature conformable to the desire of the digestive motions, do resist, and then a War begins, whereby the body suffers most; for it causes either a sickness in the stomack, or a pain in the head, or in the heart, or in the bowels, or the like: Nay, if the received food gets an absolute victory, it dissolves and alters oftentimes the whole body, it self remaining entire and unaltered, as is evident in those that die of surfeits. But most commonly these strifes and quarrels, if violent, do alter and dissolve each others forms or natures. And many times it is not the fault of the Received, but of the Receiver; as for example, when the digestive and transforming motions are either irregular, or weak; for they being too weak, or too few, the meat or food received is digested onely by halves; and being irregular, it causes that which we call corruption. But it may be observed, that the Received food is either agreeable, or disagreeable, to the Receiver; if agreeable, then there is a united consent of Parts, to act regularly and perfectly in digestion; if disagreeable, then the Received acts to the Ruine, that is, to the alteration or dissolution of the Nature of the Receiver; but if it be neutral, that is, neither perfectly agreeable, nor perfectly disagreeable, but between both, then the receiver, or rather the digestive Motions of the receiver, use a double strength to alter and transform the received. But you may ask me, Madam, what the reason is, that many things received, after they are dissolved into small parts, those parts will keep their former colour and savour? I answer; The cause is, that either the retentive Motions in the Parts of the received, are too strong for the digestive and alterative Motions of the receiver, or perchance, this colour and savour is so proper to them, as not to be transchanged: but you must observe, that those digestive, alterative and transchanging motions, do not act or move all after one and the same manner; for some do dissolve the natural figure of the received, some disperse its dissolved parts into the parts of the body, some place the dispersed parts fitly and properly for the use, benefit, and consistence of the body; for there is so much variety in this one act of digestion, as no man is able to conceive; and if there be such variety in one Particular natural action, what variety will there not be in all Nature? Wherefore, it is not, as I mentioned in the beginning, either Ferment, or Heat, or any other thing, that causes digestion; for if all the constitution and nature of our body was grounded or did depend upon Ferment, then Brewers and Bakers, and those that deal with Ferments, would be the best Physicians. But I would fain know the cause which makes Ferment? You may say, saltness, and sowreness. But then I ask, From whence comes saltness and sowreness? You may say, From the Ferment. But then I shall be as wise as before. The best way, perhaps, may be to say, with your Author, that Ferment is a Primitive Cause, and a beginning or Principle of other things, and it self proceeds from nothing. But then it is beyond my imagination, how that can be a Principle of material things, which it self is nothing; that is, neither a substance, nor an accident. Good Lord! what a stir do men make about nothing! I am amazed to see their strange Fancies and Conceptions vented for the Truest Reasons: Wherefore I will return to my simple opinion; and as I cannot conceive any thing that is beyond Matter, or a Body; so I believe, according to my reason, that there is not any part in Nature, be it never so subtil or small, but is a self-moving substance, or endued with self-motion; and according to the regularity and irregularity of these motions, all natural effects are produced, either perfect, or imperfect; timely births, or untimely and monstrous births; death, health, and diseases, good and ill dispositions, natural and extravagant Appetites and Passions, (I say natural, that is, according to the nature of their figures;) Sympathy and Antipathy, Peace and War, Rational and Phantastical opinions. Nevertheless, all these motions, whether regular or irregular, are natural; for regularity and irregularity hath but a respect to particulars, and to our conceptions, because those motions which move not after the ordinary, common or usual way or manner, we call Irregular. But the curiosity and variety in Nature is unconceiveable by any particular Creature; and so leaving it, I rest,
Madam,
Your faithful Friend
and Servant.