THREE:

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THREE:An excellent plan to retain what is learned, is to make notes. There is nothing will assist the memory more in learning mechanics than to write down facts as they are learned, even if such memoranda are never referred to after they are made.

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THREE:Timon, a celebrated disciple of Pyrrho, added another and, from the speculative point of view, a much more powerful argument, which, however, may equally have been139 borrowed from the master��s lectures. Readers of the Posterior Analytics will remember how strongly Aristotle dwells on the necessity of starting with first principles which are self-evidently true. The chain of demonstration must have something to hang on, it cannot be carried back ad infinitum. Now, Timon would not admit of such a thing as first principles. Every assumption, he says, must rest on some previous assumption, and as this process cannot be continued for ever, there can be no demonstration at all. This became a very favourite weapon with the later Sceptics, and, still at the suggestion of Aristotle, they added the further ��trope�� of compelling their adversaries to choose between going back ad infinitum and reasoning in a circle��in other words, proving the premises by means of the conclusion. Modern science would not feel much appalled by the sceptical dilemma. Its actual first principles are only provisionally assumed as ultimate, and it is impossible for us to tell how much farther their analysis may be pursued; while, again, their validity is guaranteed by the circular process of showing that the consequences deduced from them agree with the facts of experience. But as against those modern philosophers who, in adherence to the Aristotelian tradition, still seek to base their systems on first principles independent of any individual experience, the sceptical argument is unanswerable, and has even been strengthened by the progress of knowledge. To this day, thinkers of different schools cannot agree about the foundations of belief, and what to one seems self-evidently true, is to another either conceivably or actually false. To Mr. Herbert Spencer the persistence of force is a necessary truth; to Prof. Stanley Jevons its creation is a perfectly possible contingency; while to others, again, the whole conception of force, as understood by Mr. Spencer, is so absolutely unmeaning that they would decline to entertain any proposition about the invariability of the objective reality which it is supposed to represent. And when the140 �� priori dogmatist affects to treat the negations of his opponents as something that they do not think, but only think they think, they may, with perfect fairness, attribute his rejection of their beliefs��as, for example, free-will��to a similar subjective illusion. Moreover, the pure experimentalists can point to a circumstance not foreseen by the ancient sceptics, which is that propositions once generally regarded as incontrovertible by thinking men, are now as generally abandoned by them.

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THREE:"I didn't see you," said Bruce.

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THREE:"Ah, you have been down for Mamie," the Countess exclaimed. "She had one of her turns again. Give the poor child some of that soda-water and then follow me. Be quick."In criticising the Stoic system as a whole, the New Academy and the later Sceptics had incidentally dwelt on sundry absurdities which followed from the materialistic interpretation of knowledge; and Plotinus evidently derived some of his most forcible objections from their writings; but no previous philosopher that we know of had set forth the whole case for spiritualism and against materialism with such telling effect. And what is, perhaps, more important than any originality in detail, is the profound insight shown in choosing this whole question of spiritualism versus materialism for the ground whereon the combined forces of Plato and Aristotle were to fight their first battle against the naturalistic system which had triumphed over them five centuries before. It was on dialectical and ethical grounds that the controversy between Porch and Academy, on ethical and religious grounds that the controversy between Epicureanism and all other schools of philosophy, had hitherto been conducted. Cicero and Plutarch never allude to their opponents as materialists. Only once, in his polemic against Col?tes, does Plutarch observe that neither a soul nor anything else could be made out of atoms, but this is because they are discrete, not because they are extended.446 For the rest, his method is to trip up his opponents by pointing out their inconsistencies, rather than to cut the ground from under their feet by proving that their theory of the universe is wrong.

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