Concerning Addition and Subtraction, wherein your _Author_ sayes Reasoning consists, I grant, that it is an act of Reasoning, yet it doth not make Sense or Reason, which is Life and Knowledge, but Sense and Reason which is self-motion, makes addition and subtraction of several Parts of matter; for had matter not self-motion, it could not divide nor compose, nor make such varieties, without great and lingring retardments, if not confusion. Wherefore all, what is made in Nature, is made by self-moving matter, which self-moving matter doth not at all times move regularly, but often irregularly, which causes false Logick, false Arithmetick, and the like; and if there be not a certainty in these self-motions or actions of Nature, much less in Art, which is but a secundary action; and therefore, neither speech, words, nor exterior objects cause Understanding or Reason. And although many parts of the Rational and Sensitive Matter joyned into one, may be stronger by their association, and over-power other parts that are not so well knit and united, yet these are not the less pure; onely these Parts and Motions being not equal in several Creatures, make their Knowledge and Reason more or less: For, when a man hath more Rational Matter well regulated, and so more Wisdom then an other, that same man may chance to over-power the other, whose Rational Matter is more irregular, but yet not so much by strength of the united Parts, as by their subtilty; for the Rational Matter moving regularly, is more strong with subtilty, then the sensitive with force; so that Wisdom is stronger then Life, being more pure, and so more active; for in my opinion, there is a degree of difference between Life and Knowledge, as my Book of _Philosophical Opinions_ will inform you.