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THREE:But the shell-fire of the French overtook them then, as they were retreating, while many others were killed by bombs from French aeroplanes, which were in action in great numbers. The retreat had not stopped before the Germans arrived in Cambray, where the thousands of wounded could at last be put in long trains and sent to Aix-la-Chapelle. A great many bombs from aeroplanes also hit these trains and killed a great many; my own train was everywhere pierced by fragments of those bombs. Within the carriages it was unendurable; the wounded men and their malodorous bandages had occupied them such a long time that the atmosphere was simply insupportable. Happily there was a corridor, where I stood all the time, with the little girl, in the company of some German military men who were sent home, not on account of wounds, but because of internal complaints.We have seen how Greek thought had arrived at a perfectly just conception of the process by which all physical transformations are effected. The whole extended universe is an aggregate of bodies, while each single body is formed by a combination of everlasting elements, and is destroyed by their separation. But if Empedocles was right, if these primary substances were no other than the fire, air, water, and earth of everyday experience, what became of the Heracleitean law, confirmed by common observation, that, so far from remaining unaltered, they were continually passing into one another? To this question the atomic theory gave an answer so conclusive, that, although ignored or contemned by later schools, it was revived with the great revival of science in the sixteenth century, was successfully employed in the explanation of every order of phenomena, and still remains the basis of all physical enquiry. The undulatory theory of light, the law of universal gravitation, and the laws of chemical combination can only be expressed in terms implying the existence of atoms; the laws of gaseous diffusion, and of thermodynamics generally, can only be understood with their help; and the latest develop34ments of chemistry have tended still further to establish their reality, as well as to elucidate their remarkable properties. In the absence of sufficient information, it is difficult to determine by what steps this admirable hypothesis was evolved. Yet, even without external evidence, we may fairly conjecture that, sooner or later, some philosopher, possessed of a high generalising faculty, would infer that if bodies are continually throwing off a flux of infinitesimal particles from their surfaces, they must be similarly subdivided all through; and that if the organs of sense are honeycombed with imperceptible pores, such may also be the universal constitution of matter.26 Now, according to Aristotle, Leucippus, the founder of atomism, did actually use the second of these arguments, and employed it in particular to prove the existence of indivisible solids.27 Other considerations equally obvious suggested themselves from another quarter. If all change was expressible in terms of matter and motion, then gradual change implied interstitial motion, which again involved the necessity of fine pores to serve as channels for the incoming and outgoing molecular streams. Nor, as was supposed, could motion of any kind be conceived without a vacuum, the second great postulate of the atomic theory. Here its advocates directly joined issue with Parmenides. The chief of the Eleatic school had, as we have seen, presented being under the form of a homogeneous sphere, absolutely continuous but limited in extent. Space dissociated from matter was to him, as afterwards to Aristotle, non-existent and impossible. It was, he exclaimed, inconceivable, nonsensical. Unhappily inconceivability is about the worst negative criterion of truth ever yet invented. His challenge was now35 taken up by the Atomists, who boldly affirmed that if non-being meant empty space, it was just as conceivable and just as necessary as being. A further stimulus may have been received from the Pythagorean school, whose doctrines had, just at this time, been systematised and committed to writing by Philolaus, its most eminent disciple. The hard saying that all things were made out of number might be explained and confirmed if the integers were interpreted as material atoms.

THREE:On Alexander��s departure for the East, Aristotle returned to Athens, where he now placed himself at the head of a new philosophical school. The ensuing period of thirteen years288 was fully occupied by the delivery of public lectures, and by the composition of those encyclopaedic writings which will preserve his memory for ever, along, perhaps, with many others which have not survived. Like Anaxagoras, he was not allowed to end his days in the city of his adoption. His youthful attacks on Isocrates had probably made him many enemies among that rhetor��s pupils. It is supposed by Grote, but warmly disputed by Zeller, that his trenchant criticisms on Plato had excited a similar animosity among the sectaries of the Academy.178 Anyhow, circumstances had unavoidably associated him with the detested Macedonian party, although his position, as a metic, or resident alien, debarred him from taking any active part in politics. With Alexander��s death the storm broke loose. A charge was trumped up against Aristotle, on the strength of his unlucky poem in honour of Hermeias, which was described as an insult to religion. That such an accusation should be chosen is characteristic of Athenian bigotry, even should there be no truth in the story that certain philosophical opinions of his were likewise singled out for prosecution. Before the case came on for trial, Aristotle availed himself of the usual privilege allowed on such occasions, and withdrew to Chalcis, in order, as he said, that the Athenians need not sin a second time against philosophy. But his constitution, naturally a feeble one, was nearly worn out. A year afterwards he succumbed to a stomach complaint, aggravated, if not produced, by incessant mental application. His contemporary, Demosthenes, perished about the same time, and at the same age, sixty-two. Within little more than a twelvemonth the world had lost its three greatest men; and after three centuries of uninterrupted glory, Hellas was left unrepresented by a single individual of commanding genius.

THREE:We have now reached a point where Greek philosophy seems to have swung back into the position which it occupied three hundred years before, towards the close of the Peloponnesian War. The ground is again divided between naturalists and humanists, the one school offering an encyclopaedic training in physical science and exact philology, the other literary, sceptical, and limiting its attention to the more immediate interests of life; but both agreeing in the supreme importance of conduct, and differing chiefly as to whether its basis should or should not be sought in a knowledge of the external world. Materialism is again in the ascendant, to this extent at least, that no other theory is contemplated by the students of physical science; while the promise of a spiritualistic creed is to be found, if at all, in the school whose scepticism throws it back on the subjective sphere, the invisible and impalpable world of mind. The attitude of philosophy towards religion has, indeed, undergone a marked change; for the Stoic naturalists count themselves among the159 most strenuous supporters of beliefs and practices which their Sophistic predecessors had contemned, while the humanist criticism is cautiously guarded by at least an external conformity to established usage; but the Platonic doctrine of immortality has disappeared with the dogmatic spiritualism on which it rested; and faith in superior beings tends to dissociate itself from morality, or to become identified with a simple belief in the fixity of natural law.

THREE:After driving through this scene of misery we158 entered Charleroi, and exactly at that moment one of the springs of my motor broke in two, which made the car useless. Charleroi seemed worse damaged than Namur. According to an official statement issued at the time, one hundred and sixty-five houses had been burned, among them many on the fine Boulevard Audent, the Saint Joseph Institute, the convent of the S?urs de Namur, and the adjacent ancient, miraculous little chapel of "Sainte Marie des Remparts."