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THREE:

FORE:Meanwhile a new and powerful agency was about to interpose with decisive effect in the doubtful struggle. This was the study of mathematics. Revived by the Arabians and never wholly neglected during the Middle Ages, it had profited by the general movement of the Renaissance, and was finally applied to the cosmical problem by Galileo. In this connexion, two points of profound philosophical interest must be noted. The first is that, even in its fall, the Aristotelian influence survived, to some extent, both for good and for evil. To Aristotle belongs the merit of having been the first to base astronomy on physics. He maintains the earth��s immobility on experimental no less than on speculative grounds. A stone thrown straight up in the air returns to its starting-point instead of falling to the west of it; and the absence of stellar385 parallax seems to show that there is no change in our position relatively to the heavenly bodies. After satisfying himself, on empirical considerations, that the popular astronomy is true, he proceeds to show that it must be true, by considerations on the nature of matter and motion, which, although mistaken, are conceived in a genuinely scientific spirit. Now Galileo saw that, to establish the Copernican system, he must first grapple with the Peripatetic physics, and replace it by a new dynamical theory. This, which he could hardly have effected by the ordinary mathematical methods, he did by borrowing the analytical method of Atomism and applying it to the measurement of motion. The law of falling bodies was ascertained by resolving their descent into a series of moments, and determining its rate of velocity at successive intervals; and curvilinear motions were similarly resolved into the combination of an impulsive with an accelerating force, a method diametrically opposed to that of Bacon, who would not even accept the rough analysis of the apparent celestial motions proposed by Greek astronomers.In the face of such facts, to say, as Mr. Froude does, that Epicureanism was ��the creed of the men of science�� in the time of Julius Caesar111��an assertion directly contradicted by Lange112��is perhaps only of a piece with Mr. Froude��s usual inaccuracy when writing about ancient history; but such declarations as that of Mr. Frederic Pollock, that the Epicurean system56 ��was a genuine attempt at a scientific explanation of the world; and was in its day the solitary protest against the contempt of physics which prevailed in the other post-Aristotelian schools;��113 of Prof. Trezza, that the Epicurean school ��summed up in itself the most scientific elements of Greek antiquity;��114 of Dr. Woltjer, that ��with respect to the laws and principles of science, the Epicureans came nearest of all the ancients to the science of our own time;��115 and finally, of M. Ernest Renan, that Epicureanism was ��the great scientific school of antiquity,��116 are absolutely amazing. The eminent French critic just quoted has elsewhere observed, with perfect justice, that the scientific spirit is the negation of the supernatural; and perhaps he argues that the negation of the supernatural must, reciprocally, be the scientific spirit. But this is only true when such a negation is arrived at inductively, after a disinterested survey of the facts. Epicurus started with the denial of supernatural interference as a practical postulate, and then hunted about for whatever explanations of natural phenomena would suit his foregone conclusion. Moreover, an enquirer really animated by the scientific spirit studies the facts for their own sake; he studies them as they actually are, not resting content with alternative explanations; and he studies them to the fullest extent of which his powers are capable. Epicurus, on the contrary, declares that physics would not be worth attending to if the mind could be set free from religious terrors in any other manner;117 he will not let himself be tied down to any one theory if there are others equally inconsistent with divine agency to be had;118 and when his demands in this respect are satisfied, that is, when the appearances vulgarly ascribed to supernatural causation have been provided with natural causes, he leaves off.

TWO:With regard to the universal soul of Nature, there is, indeed, no difficulty at all. In giving a sensible realisation to the noetic ideas, she suffers no degradation or pollution by contact with the lower elements of matter. Enthroned on the outer verge of the cosmos, she governs the whole course of Nature by a simple exercise of volition, and in the enjoyment of a felicity which remains undisturbed by passion or desire. But just as we have seen the supreme Nous resolving itself into a multitude of individual intelligences, so also does the cosmic soul produce many lesser or partial souls of which our own is one. Now these derivative souls cannot all be equal, for that would be to defeat the purpose of creation, which is to realise all the possibilities of creation from the highest to the lowest. Thus each has an office corresponding to her place in the scale of perfection.452 We may say of the human soul that she stoops to conquer. Her mission is to cope with the more recalcitrant forms of matter. It is to the struggle with their impurities that the troubles and passions of our life are due. By yielding to earthly temptations, we suffer a second fall, and one much more real than the first; by overcoming them, as is perfectly in our power to do, we give scope and exercise to faculties which would otherwise307 have remained dormant and unknown. Moreover, our soul retains the privilege of returning to her former abode, enriched by the experience acquired in this world, and with that clearer perception of good which the knowledge of its opposite alone can supply. Nay, paradoxical as the assertion may seem, she has not entirely descended to earth, but remains in partial communication with the noetic world by virtue of her reasoning faculty; that is to say, when its intuitions are not darkened and disturbed by the triumph of sensuous impressions over the lower soul. On this and on many other occasions, Plotinus betrays a glimmering consciousness that his philosophy is purely subjective, and that its attempted transcendentalism is, in truth, a projection of psychological distinctions into the external world. Starting with the familiar division of human nature into body, soul, and spirit (or reason), he endeavours to find an objective counterpart for each. Body is represented by the material universe, soul by the animating principle of Nature, reason by the extramundane Nous. Under these three heads is comprised the totality of real existence; but existence itself has to be accounted for by a principle lying above and beyond it, which has still to be obtained by an effort of abstraction from the data that self-consciousness supplies.453

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