Matter, which Natural Matter is the onely Principle of all Natural Effects and Creatures whatever; and this Principle, I am confident your _Author_ can no more prove to be Water, then he can prove that Heat, Light, Life, Motion, and _Blas_, are not material. Concerning what he saith, That _Native Heat is no where in things, except from Light, Life, Motion, and an altering Blas_: I believe that motion of life makes not onely heat, but all effects whatsoever; but this native heat is not produced onely from the motions of Particular lives in particular Creatures, but it is made by the motions of Natures life; which life, in all probability, is the self-moving Matter, which no doubt, can and doth make Light and Blas without Heat, and Heat without Light or Blas; Wherefore Light and Blas are not principles of native Heat, no more then native Heat is the principle of Light and Blas. Neither is Water the Principle of Actual moisture, nor the propriety of seeds the Principle of all Virtual moisture; but self-moving Matter is the Principle of all, and makes both actual and virtual moisture, and there is no question but there are many sorts of moistures. As for _Dryness_, which he says, _is by it self in the Air and Earth, and in Fruits by reason of the Seeds and Coagulations_: I cannot conceive how any thing can be by it self in Nature, by reason there is nothing alone and single in Nature, but all are inseparable parts of one body: perchance, he means, it is naturally and essentially inherent in Air and Earth; but neither can that be in my reason, because all Creatures and Effects of Nature are Intermixt, and there is as much dryness in other Creatures, as in Air and Earth. Lastly, as for his opinion, That _there are no Contraries in Nature_; I believe not in the essence or nature of Matter; but sense and reason inform us, that there are Contraries in Natures actions, which are Corporeal motions, which cause mixtures, qualities, degrees, discords, as also harmonious conjunctions and concords, compositions, divisions, and the like effects whatsoever. But though your _Author_ seems to be an enemy to the mixtures of Elements, yet he makes such a mixture of Divinity, and natural Philosophy, that all his Philosophy is nothing but a meer Hotch-potch, spoiling one with the other. And so I will leave it to those that delight in it, resting, Madam, _Your faithful Friend_ _and Servant._ [1] _In his Treatise called_, A passive deceiving of the Schools of the Humourists. IV. _MADAM,_