Your _Authors_[1] opinion is, That _a bright burning Iron doth not burn a dead Carcass after an equal manner as it doth a live one; For in live bodies_, saith he, _it primarily hurts the sensitive Soul, the which therefore being impatient, rages after a wonderful manner, doth by degrees resolve and exasperate its own and vital liquors into a sharp poyson, and then contracts the fibres of the flesh, and turns them into an escharre, yea, into the way of a coal; but a dead Carcass is burnt by bright burning Iron, no otherwise, then if Wood, or if any other unsensitive thing should be; that is, it burns by a proper action of the fire, but not of the life._ To which opinion, I answer: That my Reason cannot conceive any thing to be without life, and so neither without sense; for whatsoever hath self-motion, has sense and life; and that self-motion is in every Creature, is sufficiently discoursed of in my former Letters, and in my _Philosophical Opinions_; for self-motion, sense, life, and reason, are the grounds and principles of Nature, without which no Creature could subsist. I do not say, That there is no difference between the life of a dead Carcass, and a live one, for there is a difference between the lives of every Creature; but to differ in the manner of life, and to have neither life nor sense at all, are quite different things: But your _Author_ affirms himself, that all things have a certain sense of feeling, when he speaks of Sympathy and Magnetisme, and yet he denies that they have life: And others again, do grant life to some Creatures, as to Vegetables, and not sense. Thus they vary in their Opinions, and divide sense, life, and motion, when all is but one and the same thing; for no life is without sense and motion, nor no motion without sense and life; nay, not without Reason; for the chief Architect of all Creatures, is sensitive and rational Matter. But the mistake is, that most men, do not, or will not conceive, that there is a difference and variety of the corporeal sensitive and rational motions in every Creature; but they imagine, that if all Creatures should have life, sense, and reason, they must of necessity have all alike the same motions, without any difference; and because they do not perceive the animal motions in a Stone or Tree, they are apt to deny to them all life, sense, and motion. Truly, _Madam_, I think no man will be so mad, or irrational, as to say a Stone is an Animal, or an Animal is a Tree, because a Stone and Tree have sense, life, and motion; for every body knows, that their Natural figures are different, and if their Natures be different, then they cannot have the same Motions, for the corporeal motions do make the nature of every particular Creature, and their differences; and as the corporeal motions act, work, or move, so is the nature of every figure, Wherefore, nobody, I hope, will count me so senseless, that I believe sense and life to be after the like manner in every