95. Spinosa does not essentially differ from the pantheists of old. He conceived, as they had done, that the infinity of God required the exclusion of all other substance; that he was infinite ab omni parte, and not only in certain senses. And probably the loose and hyperbolical tenets of the schoolmen, derived from ancient philosophy, ascribing, as a matter of course, a metaphysical infinity to all the divine attributes, might appear to sanction those primary positions, from which Spinosa, unfettered by religion, even in outward profession, went on “sounding his dim and perilous track” to the paradoxes that have thrown discredit on his name. He had certainly built much on the notion that the essence or definition of the Deity involved his actuality or existence, to which Descartes had given vogue.
96. Notwithstanding the leading errors of this philosopher, his clear and acute understanding perceived many things which baffle ordinary minds. Thus, he well saw and well stated the immateriality of thought. Oldenburg, in one of his letters, had demurred to this, and reminded Spinosa that it was still controverted whether thought might not be a bodily motion. “Be it so,” replied the other, “though I am far from admitting it; but at least you must allow that extension, so far as extension, is not the same as thought.”[856] It is from inattention to this simple truth that all materialism, as it has been called, has sprung. Its advocates confound the union between thinking and extension or matter (be it, if they will, an indissoluble one) with the identity of the two, which is absurd and inconceivable. “Body,” says Spinosa in one of his definitions, “is not terminated by thinking, nor thinking by body.”[857] This also does not ill express the fundamental difference of matter and mind; there is an incommensurability about them, which prevents one from bounding the other, because they can never be placed in juxtaposition.
[856] At ais, forte cogitatio est actus corporeus. Sit, quamvis nullus concedam; sed hoc unum non negabis, extensionem, quoad extensionem, non esse cogitationem. Epist. iv.
[857] Corpus dicitur finitum, quia aliud semper majus concipimus. Sic cogitatio alia cogitatione terminatur. At corpus non terminatur cogitatione, nec cogitatio corpore.
Glanvil’s Scepsis Scientifica. 97. England, about the æra of the Restoration, began to make a struggle against the metaphysical creed of the Aristotelians, as well as against their natural philosophy. A remarkable work, but one so scarce as to be hardly known at all, except by name, was published by Glanvil in 1661, with the title, the Vanity of Dogmatizing. A second edition, in 1663, considerably altered, is entitled Scepsis Scientifica.[858] This edition has a dedication to the Royal Society, which comes in place of a fanciful preface, wherein he had expatiated on the bodily and mental perfections of his protoplast, the father of mankind.[859] But in proportion to the extravagant language he employs to extol Adam before his lapse, is the depreciation of his unfortunate posterity, not, as common among theologians, with respect to their moral nature, but to their reasoning faculties. The scheme of Glanvil’s book is to display the ignorance of man, and especially to censure the Peripatetic philosophy of the schools. It is, he says, captious and verbal, and yet does not adhere itself to any constant sense of words, but huddles together insignificant terms, and unintelligible definitions; it deals with controversies, and seeks for no new discovery or physical truth. Nothing, he says, can be demonstrated but when the contrary is impossible, and of this there are not many instances. He launches into a strain of what may be called scepticism, but answered his purpose in combating the dogmatic spirit still unconquered in our academical schools. Glanvil had studied the new philosophy, and speaks with ardent eulogy of “that miracle of men, the illustrious Descartes.” Many, if not most, of his own speculations are tinged with a Cartesian colouring. He was however far more sceptical than Descartes, or even than Malebranche. Some passages from so rare and so acute a work may deserve to be chosen, both for their own sakes, and in order to display the revolution which was at work in speculative philosophy.
[858] This Book, I believe, especially in the second edition, is exceedingly scarce. The editors, however, of the Biographia Britannica art. Glanvil, had seen it, and also Dugald Stewart. The first edition, or Vanity of Dogmatizing, is in the Bodleian Catalogue, and both are in the British Museum.
[859] Thus, among other extravagances worthy of the Talmud, he says, “Adam needed no spectacles. The acuteness of his natural optics (if conjecture may have credit), showed him much of the celestial magnificence and bravery without a Galileo’s tube; and it is most probable that his naked eyes could reach near as much of this upper world as we with all the advantages of art. It may be it was as absurd even in the judgment of his senses, that the sun and stars should be so very much less than this globe, as the contrary seems in ours; and it is not unlikely that he had as clear a perception of the earth’s motion as we have of its quiescence.” p. 5, edit. 1661. In the second edition, he still adheres to the hypothesis of intellectual degeneracy, but states it with less of rhapsody.
98. “In the unions which we understand the extremes are reconciled by interceding participations of natures, which have somewhat of either. But body and spirit stand at such a distance in their essential compositions, that to suppose an uniter of a middle construction, that should partake of some of the qualities of both, is unwarranted by any of our faculties, yea, most absonous to our reasons; since there is not any the least affinity betwixt length, breadth, and thickness, and apprehension, judgment, and discourse; the former of which are the most immediate results, if not essentials of matter, the latter of spirit.”[860]
[860] Scepsis Scientifica, p. 16. We have just seen something similar in Spinosa.
99. “How is it, and by what art does it (the soul), read that such an image or stroke in matter (whether that of her vehicle or of the brain, the case is the same), signifies such an object? Did we learn an alphabet in our embryo state? And how comes it to pass that we are not aware of any such congenite apprehensions? We know what we know; but do we know any more? That by diversity of motions we should spell out figures, distances, magnitudes, colours, things not resembled by them, we must attribute to some secret deduction. But what this deduction should be, or by what medium this knowledge is advanced, is as dark as ignorance. One that hath not the knowledge of letters may see the figures, but comprehends not the meaning included in them; an infant may hear the sounds and see the motion of the lips, but hath no conception conveyed by them, not knowing what they are intended to signify. So our souls, though they might have perceived the motions and images themselves by simple sense, yet, without some implicit inference, it seems inconceivable how by that means they should apprehend their anti-types. The striking of divers filaments of the brain cannot well be supposed to represent distances, except some kind of inference be allotted us in our faculties; the concession of which will only stead us as a refuge for ignorance, when we shall meet what we would seem to shun.”[861] Glanvil, in this forcible statement of the heterogeneity of sensations, with the objects that suggest them, has but trod in the steps of the whole Cartesian school, but he did not mix this up with those crude notions that halt half way between immaterialism and its opposite; and afterwards well exposes the theories of accounting for the memory by means of images in the brain, which, in various ways, Aristotle, Descartes, Digby, Gassendi, and Hobbes had propounded, and which we have seen so favourite a speculation of Malebranche.