FORE:The scepticism of Protagoras went beyond theology and extended to all science whatever. Such, at least, seems to have been the force of his celebrated declaration that ��man is the measure of all things, both as regards their existence and their non-existence.��67 According to Plato, this doctrine followed from the identification of knowledge with sensible perception, which in its turn was based on a modified form of the Heracleitean theory of a perpetual flux. The series of external changes which constitutes Nature, acting on the series of internal changes which constitutes each man��s personality, produces particular sensations, and these alone are the true reality. They vary with every variation in the88 factors, and therefore are not the same for separate individuals. Each man��s perceptions are true for himself, but for himself alone. Plato easily shows that such a theory of truth is at variance with ordinary opinion, and that if all opinions are true, it must necessarily stand self-condemned. We may also observe that if nothing can be known but sensation, nothing can be known of its conditions. It would, however, be unfair to convict Protagoras of talking nonsense on the unsupported authority of the Theaet��tus. Plato himself suggests that a better case might have been made out for the incriminated doctrine could its author have been heard in self-defence. We may conjecture that Protagoras did not distinguish very accurately between existence, knowledge, and applicability to practice. If we assume, what there seems good reason to believe, that in the great controversy of Nature versus Law, Protagoras sided with the latter, his position will at once become clear. When the champions of Nature credited her with a stability and an authority greater than could be claimed for merely human arrangements, it was a judicious step to carry the war into their territory, and ask, on what foundation then does Nature herself stand? Is not she, too, perpetually changing, and do we not become acquainted with her entirely through our own feelings? Ought not those feelings to be taken as the ultimate standard in all questions of right and wrong? Individual opinion is a fact which must be reckoned with, but which can be changed by persuasion, not by appeals to something that we none of us know anything about. Man is the measure of all things, not the will of gods whose very existence is uncertain, nor yet a purely hypothetical state of Nature. Human interests must take precedence of every other consideration. Hector meant nothing else when he preferred the obvious dictates of patriotism to inferences drawn from the flight of birds.

FORE:These divisions of machinery will next be treated of separately, with a view of making the classification more clear, and to explain the principles of operation in each division. This dissertation will form a kind of base upon which the practical part of the treatise will in a measure rest. It is trusted that the reader will carefully consider each proposition that is laid down, and on his own behalf pursue the subjects farther than the limits here permit.

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FORE:CHAPTER XXX. TURNING LATHES.

FORE:Lawrence came in puffing one of his eternal cigarettes. His manner was full of confidence.

FORE:The power which Socrates possessed of rousing other minds to independent activity and apostolic transmission of spiritual gifts was, as we have said, the second verification of his doctrine. Even those who, like Antisthenes and Aristippus, derived their positive theories from the Sophists rather than from him, preferred to be regarded as his followers; and Plato, from whom his ideas received their most splendid development, has acknowledged the debt by making that venerated figure the centre of his own immortal Dialogues. A third verification is given by the subjective, practical, dialectic tendency of all subsequent philosophy properly so called. On this point we will content ourselves with mentioning one instance out of many, the recent declaration of Mr. Herbert Spencer that his whole system was constructed for the sake of its ethical conclusion.101

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FORE:Yet throughout the philosophy of Plato we meet with a tendency to ambiguous shiftings and reversions of which, here also, due account must be taken. That curious blending of love and hate which forms the subject of a mystical lyric in Mr. Browning��s Pippa Passes, is not without its counterpart in purely rationalistic discussion. If Plato used the Socratic method to dissolve away much that was untrue, because incomplete, in Socratism, he used it also to absorb much that was deserving of development in Sophisticism. If, in one sense, the latter was a direct reversal of his master��s teaching, in another it served as a sort of intermediary between that teaching and the unenlightened consciousness of mankind. The shadow should not be confounded with the substance, but it might show by contiguity, by resemblance, and by contrast where the solid reality lay, what were its outlines, and how its characteristic lights might best be viewed.

FORE:"The burgomaster informs the population that any utterance contrary to the regulations will be severely punished.

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