FORE:It remains to add a few words on the position which ancient and modern philosophy respectively occupy towards theology. Here their relation is one of contrast rather than of resemblance. The Greek thinkers start at an immense distance from religious belief, and their first allusions to it are marked by a scornful denial of its validity. Gradually, with the transition from physical to ethical enquiries, an approximation between the two is brought about, though not without occasional returns to their former attitude of hostility. Finally, in presence of a common danger they become interwoven and almost identified with one another; while the new religion against which they make common cause, itself presents the same spectacle of metaphysical and moral ideas entering into combination with the spontaneous products of popular mythology. And be it observed that throughout the whole of this process action and reaction were equal and contrary. The decline and corruption of philosophy was the price paid for the elevation and purification of religion. While the one was constantly sinking, the other was constantly rising, until they converged on the plane of dogmatic theology. By the very circumstances of the case, an opposite course has been imposed on the development of modern philosophy. Starting from an intimate union with religion, it slowly disengages itself from the compromising alliance; and, although, here also, the normal course of ideas has been interrupted by frequent reactions, the general movement of European thought has been no less decidedly towards a complete emancipation from the popular beliefs than the movement of Greek thought had been towards their conciliation and support.We are now in a position to understand the full force of Descartes Cogito ergo sum. It expresses the substantiality of self-conscious Form, the equal claim of thought with extension to be recognised as an element of the universe. This recognition of self-consciousness as the surest reality was, indeed, far from being new. The Greek Sceptics had never gone to the length of doubting their own personal existence. On the contrary, they professed a sort of subjective idealism. Refusing to go beyond their own consciousness, they found in its undisturbed self-possession the only absolute satisfaction that life could afford. But knowledge and reality had become so intimately associated with something independent of mind, and mind itself with a mere reflection of reality, that the denial of an external world393 seemed to the vulgar a denial of existence itself. And although Aristotle had found the highest, if not the sole absolute actuality in self-thinking thought, he projected it to such a distance from human personality that its bearing on the sceptical controversy had passed unperceived. Descartes began his demonstration at the point where all the ancient systems had converged, but failed to discover in what direction the conditions of the problem required that they should be prolonged. No mistake can be greater than to regard him as the precursor of German philosophy. The latter originated quite independently of his teaching, though not perhaps of his example, in the combination of a much profounder scepticism with a much wider knowledge of dogmatic metaphysics. His method is the very reverse of true idealism. The Cogito ergo sum is not a taking up of existence into thought, but rather a conversion of thought into one particular type of existence. Now, as we have seen, all other existence was conceived as extension, and however carefully thought might be distinguished from this as absolutely indivisible, it was speedily reduced to the same general pattern of inclusion, limitation, and expansion. Whereas Kant, Fichte, and Hegel afterwards dwelt on the form of thought, Descartes attended only to its content, or to that in which it was contained. In other words, he began by considering not how he thought but what he thought and whence it camehis ideas and their supposed derivation from a higher sphere. Take, for example, his two great methods for proving the existence of God. We have in our minds the idea of a perfect beingat least Descartes professed to have such an idea in his mind,and we, as imperfect beings, could not have originated it for ourselves. It must, therefore, have been placed there by a perfect being acting on us from without. It is here taken for granted that the mechanical equivalence between material effects and their causes must obtain in a world where spatial relations, and therefore measurement, are presumably394 unknown. And, secondly, existence, as a perfection, is involved in the idea of a perfect being; therefore such a being can only be conceived as existing. Here there seems to be a confused notion that because the properties of a geometrical figure can be deduced from its definition, therefore the existence of something more than a simple idea can be deduced from the definition of that idea itself. But besides the mathematical influence, there was evidently a Platonic influence at work; and one is reminded of Platos argument that the soul cannot die because it participates in the idea of life. Such fallacies were impossible so long as Aristotles logic continued to be carefully studied, and they gradually disappeared with its revival. Meanwhile the cat was away, and the mice used their opportunity.
