THREE:On passing from the ultimate elements of matter to those immense aggregates which surpass man in size and complexity as much as the atoms fall below him, but on whose energies his dependence is no less helpless and complete��the infinite worlds typified for us by this one system wherein we dwell, with its solid earthly nucleus surrounded by rolling orbs of light��Lucretius still carries with him the analogies of life; but in proportion to the magnitude and remoteness of the objects examined, his grasp seems to grow less firm and his touch less sure. In marked contrast to Plato, Aristotle, and the Stoics, he argues passionately against the ascription of a beneficent purpose to the constitution of the world; but his reasonings are based solely on its imperfect adaptation to the necessities of human existence. With equal vigour he maintains, apparently against Aristotle, that the present system has had a beginning; against both Aristotle and Plato that, in common with all systems, it will have an end��a perfectly true con111clusion, but evidently based on nothing stronger than the analogies of vital phenomena. And everywhere the subjective standpoint, making man the universal measure, is equally marked. Because our knowledge of history does not go far back, we cannot be far removed from its absolute beginning; and the history of the human race must measure the duration of the visible world. The earth is conceived as a mother bringing forth every species of living creature from her teeming bosom; and not only that, but a nursing mother feeding her young offspring with abundant streams of milk��an unexpected adaptation from the myth of a golden age. If we no longer witness such wonderful displays of fertility, the same elastic method is invoked to explain their cessation. The world, like other animals, is growing old and effete. The exhaustion of Italian agriculture is adduced as a sign of the world��s decrepitude with no less confidence than the freshness of Italian poetry as a sign of its youth. The vast process of cosmic change, with its infinite cycles of aggregation and dissolution, does but repeat on an overwhelming scale the familiar sequences of birth and death in animal species. Even the rising and setting of the heavenly bodies and the phases of the moon may, it is argued, result from a similar succession of perishing individuals, although we take them for different appearances of a single unalterable sphere.207A FEW words by way of introduction.

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THREE:The scepticism of Aristippus and the Cyrenaics mediated between the views of Protagoras and those of Gorgias, while marking an advance on both. According to this school, we know nothing beyond our own feelings, and it must be left undecided whether they are caused by an external reality or not. Nor can the feelings of one individual justify us in reasoning to the existence of similar feelings in the mind of another individual.221 It might be objected that the arguments advanced in support of the latter assertion are suicidal, for they are derived from the abnormal states of consciousness accompanying particular diseases, or else from the divergences of taste exhibited by different individuals even when in good health,��an apparent admission that we are sufficiently well acquainted with the phenomena in question to institute a comparison between them, which, by hypothesis, is impossible. And this is, in fact, the method by which Mr. Herbert Spencer has endeavoured to upset the whole theory of subjective idealism, as involving at every step an assumption of the very realities that it professes to deny. But the Cyrenaic and the modern idealist have a perfect right to show that the assumptions of their adversaries are self-contradictory; and the readiest way of so doing is to reason from them as if they were true. The real answer to that extreme form of idealism which denies the possibility of making known our feelings to each other is that, our bodies being similarly constructed and responding to similar impressions by similar manifestations,133 I have the same sort of warrant for assuming that your states of consciousness are like mine that I have for assuming you to exist at all. The inference must, of course, be surrounded by proper precautions, such as are seldom used by unscientific reasoners. We must make sure that the structure is the same and that the excitement is the same, or that their differences, if any, are insignificant, before we can attribute the same value to the same manifestations of feeling on the part of different persons; but that this can be done, at least in the case of the elementary sensations, is shown by the easy detection of such anomalies as colour-blindness where they exist.Yet if teleology was, in some respects, a falling-off from the rigid mechanicism first taught by the pre-Socratic schools and then again by the Cartesian school, in at least one respect it marked a comparative progress. For the first attempts made both by ancient and modern philosophy to explain vital phenomena on purely mechanical principles were altogether premature; and the immense extension of biological knowledge which took place subsequently to both, could not but bring about an irresistible movement in the opposite direction. The first to revive teleology was Leibniz, who furnished a transition from the seventeenth to the eighteenth century by his monadology. In this, Atomism is combined with Aristotelian ideas, just as it had previously been combined with Platonic ideas by Descartes. The movement of the atoms is explained by their aspiration after a more perfect state instead of by mechanical pressure. But while Leibniz still relies on423 the ontological argument of Descartes to prove the existence of God, this was soon abandoned, along with the cosmological argument, for the argument from design, which was also that used by the Stoics; while in ethics the fitness of things was substituted for the more mechanical law of self-preservation, as the rule of conduct; and the subjection of all impulse to reason was replaced by the milder principle of a control exercised by the benevolent over the malevolent instincts. This was a very distinct departure from the Stoic method, yet those who made it were more faithful to teleology than Stoicism had been; for to condemn human feeling altogether was implicitly to condemn the work of Nature or of God.

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