TWO:The functions and adaptations of machinery constitute, as already explained, the science of mechanical engineering. The functions of a machine are a foundation on which its plans are based; hence machine functions and machine effect are matters to which the attention of an apprentice should first [11] be directed.

TWO:So strong, however, was the theological reaction against Greek rationalism that Epicurus himself came under its influence. Instead of denying the existence of the gods altogether, or leaving it uncertain like Protagoras, he asserted it in the most emphatic manner. Their interference with Nature was all that he cared to dispute. The egoistic character of his whole system comes out once more in his conception of them as beings too much absorbed in their own placid enjoyments to be troubled with the work of creation and providence. He was, indeed, only repeating aloud what had long been whispered in the free-thinking circles of Athenian society. That the gods were indifferent to human interests81 was a heresy indignantly denounced by Aeschylus,159 maintained by Aristod��mus, the friend of Socrates, and singled out as a fit subject for punishment by Plato. Nor was the theology of Aristotle��s Metaphysics practically distinguishable from such a doctrine. Although essential to the continued existence of the cosmos, considered as a system of movements, the Prime Mover communicates the required impulse by the mere fact of his existence, and apparently without any consciousness of the effect he is producing. Active beneficence had, in truth, even less to do with the ideal of Aristotle than with the ideal of Epicurus, and each philosopher constructed a god after his own image; the one absorbed in perpetual thought, the other, or more properly the others, in perpetual enjoyment; for the Epicurean deities were necessarily conceived as a plurality, that they might not be without the pleasure of friendly conversation. Nevertheless, the part assigned by Aristotle to his god permitted him to offer a much stronger proof of the divine existence and attributes than was possible to Epicurus, who had nothing better to adduce than the universal belief of mankind,��an argument obviously proving too much, since it told, if anything, more powerfully for the interference than for the bare reality of supernatural agents.

TWO:He had been uneasy because he experienced no disagreeable consequences of that blow, and had therefore consulted the doctor at Bilsen, who thought that only his excited nerves had enabled him to withstand such a blow. Both had been locked up a couple of hours and their bicycles had been taken away, as also their papers. Mr. van Wersch, however, had an acquaintance at Bilsen with whom he and his companion found lodgings, and whither he was good enough to take me as well.I have mentioned already the reign of terror with which the Germans ruled the wretched townlet ever since they entered it. Something fateful might happen any moment, and actually occurred during the night of August 15th and 16th.

TWO:"drop it," Balmayne said rudely. "What's the good of that theatrical nonsense? If something is not done at once our plans are utterly ruined. Don't stand there like a tragedy actress, but suggest something."Sandy, his face moody, said nothing.

TWO:"You must try and pull yourself together," he said. "There has been an amazing piece of luck. Isidore was dining at the Lotus with Lawrence. We came down the steps together. There was a fire close by, and a hansom backed on to the pavement. To make a long story short, Isidore fainted with the pain of a broken collarbone, and they took him to Charing Cross Hospital."

TWO:

TWO:I walked about a little longer to examine the damage done. The fine Pont des Arches was for the greater part destroyed by the retreating Belgians, as well as the Pont Maghin. This is a pity, especially as regards the first-named bridge, so famous as a work of art, and the more so as other bridges had not been touched and could be used by the Germans. The bombardment did not damage the town to any great extent, but it was remarkable that the largest houses had suffered most.

TWO:We are now in a position to understand the full force of Descartes�� Cogito ergo sum. It expresses the substantiality of self-conscious Form, the equal claim of thought with extension to be recognised as an element of the universe. This recognition of self-consciousness as the surest reality was, indeed, far from being new. The Greek Sceptics had never gone to the length of doubting their own personal existence. On the contrary, they professed a sort of subjective idealism. Refusing to go beyond their own consciousness, they found in its undisturbed self-possession the only absolute satisfaction that life could afford. But knowledge and reality had become so intimately associated with something independent of mind, and mind itself with a mere reflection of reality, that the denial of an external world393 seemed to the vulgar a denial of existence itself. And although Aristotle had found the highest, if not the sole absolute actuality in self-thinking thought, he projected it to such a distance from human personality that its bearing on the sceptical controversy had passed unperceived. Descartes began his demonstration at the point where all the ancient systems had converged, but failed to discover in what direction the conditions of the problem required that they should be prolonged. No mistake can be greater than to regard him as the precursor of German philosophy. The latter originated quite independently of his teaching, though not perhaps of his example, in the combination of a much profounder scepticism with a much wider knowledge of dogmatic metaphysics. His method is the very reverse of true idealism. The Cogito ergo sum is not a taking up of existence into thought, but rather a conversion of thought into one particular type of existence. Now, as we have seen, all other existence was conceived as extension, and however carefully thought might be distinguished from this as absolutely indivisible, it was speedily reduced to the same general pattern of inclusion, limitation, and expansion. Whereas Kant, Fichte, and Hegel afterwards dwelt on the form of thought, Descartes attended only to its content, or to that in which it was contained. In other words, he began by considering not how he thought but what he thought and whence it came��his ideas and their supposed derivation from a higher sphere. Take, for example, his two great methods for proving the existence of God. We have in our minds the idea of a perfect being��at least Descartes professed to have such an idea in his mind,��and we, as imperfect beings, could not have originated it for ourselves. It must, therefore, have been placed there by a perfect being acting on us from without. It is here taken for granted that the mechanical equivalence between material effects and their causes must obtain in a world where spatial relations, and therefore measurement, are presumably394 unknown. And, secondly, existence, as a perfection, is involved in the idea of a perfect being; therefore such a being can only be conceived as existing. Here there seems to be a confused notion that because the properties of a geometrical figure can be deduced from its definition, therefore the existence of something more than a simple idea can be deduced from the definition of that idea itself. But besides the mathematical influence, there was evidently a Platonic influence at work; and one is reminded of Plato��s argument that the soul cannot die because it participates in the idea of life. Such fallacies were impossible so long as Aristotle��s logic continued to be carefully studied, and they gradually disappeared with its revival. Meanwhile the cat was away, and the mice used their opportunity.