THREE:To get rid of superstitious beliefs was, no doubt, a highly meritorious achievement, but it had been far more effectually57 performed by the great pre-Socratic thinkers, Heracleitus, Empedocles, Anaxagoras, and Democritus. These men or their followers had, besides, got hold of a most important principlethe vital principle of all sciencewhich was the reign of law, the universality and indefeasibility of physical causation. Now, Epicurus expressly refused to accept such a doctrine, declaring that it was even worse than believing in the gods, since they could be propitiated, whereas fate could not.119 Again, Greek physical philosophy, under the guidance of Plato, had been tending more and more to seek for its foundation in mathematics. Mathematical reasoning was seen to be the type of all demonstration; and the best hopes of progress were staked on the extension of mathematical methods to every field of enquiry in turn. How much might be done by following up this clue was quickly seen not only in the triumphs of geometry, but in the brilliant astronomical discoveries by which the shape of the earth, the phases of the moon, and the cause of eclipses were finally cleared up and placed altogether outside the sphere of conjecture. Nor was a knowledge of these truths confined to specialists: they were familiar alike to the older Academy, to the Peripatetic, and to the Stoic schools; so that, with the exception of those who doubted every proposition, we may assume them to have been then, as now, the common property of all educated men. Epicurus, on the other hand, seems to have known nothing of mathematics, or only enough to dispute their validity, for we are told that his disciple Polyaenus, who had previously been eminent in that department, was persuaded, on joining the school, to reject the whole of geometry as untrue;120 while, in astronomy, he pronounced the heavenly bodies to be no larger than they appear to our senses, denied the existence of Antipodes, and put the crudest guesses of early philosophy on the same footing with the best-authenticated results of later observation. It is no wonder, then, that during the whole58 continuance of his school no man of science ever accepted its teaching, with the single exception of Asclepiades, who was perhaps a Democritean rather than a disciple of the Garden, and who, at any rate, as a physiologist, would not be brought into contact with its more flagrant absurdities.Of these views, the first is taken by Ritter, and adopted with some modifications by M. Vacherot in his Histoire de lcole dAlexandrie. It is also unreservedly accepted by Donaldson in his continuation of Müllers History of Greek Literature, and is probably held at this moment by most Englishmen who take any interest in the subject at all. The second viewaccording to which Neo-Platonism is, at least in342 its main features, a characteristic although degenerate product of Greek thoughtis that maintained by Zeller. As against the Orientalising theory, it seems to us that Zeller has thoroughly proved his case.506 It may be doubted whether there is a single idea in Plotinus which can be shown to have its exact counterpart in any of the Hindoo or other Asiatic systems whence he is supposed to have drawn; and, as our own analysis has abundantly shown, he says nothing that cannot be derived, either directly or by a simple and easy process of evolution, from Plato, Aristotle, and the Stoics. On the other hand, has not Zeller gone much too far in treating Neo-Platonism as a product of the great religious reaction which unquestionably preceded and accompanied its appearance? Has he not altogether underrated its importance as a purely speculative system, an effort towards the attainment of absolute truth by the simple exercise of human reason? It seems to us that he has, and we shall offer some grounds for venturing to differ from his opinion.
One morning, when Gregor Samsa woke from troubled dreams
