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TWO:Thus, so far as was possible in such altered circumstances, did the Renaissance of the second century reproduce the271 intellectual environment from which Plato��s philosophy had sprung. In literature, there was the same attention to words rather than to things; sometimes taking the form of exact scholarship, after the manner of Prodicus; sometimes of loose and superficial declamation, after the manner of Gorgias. There was the naturalism of Hippias, elaborated into a system by the Stoics, and practised as a life by the new Cynics. There was the hedonism of Aristippus, inculcated under a diluted form by the Epicureans. There was the old Ionian materialism, professed by Stoics and Epicureans alike. There was the scepticism of Protagoras, revived by Aenesid��mus and his followers. There was the mathematical mysticism of the Pythagoreans, flourishing in Egypt instead of in southern Italy. There was the purer geometry of the Alexandrian Museum, corresponding to the school of Cyr��n��. On all sides, there was a mass of vague moral preaching, without any attempt to exhibit the moral truths which we empirically know as part of a comprehensive metaphysical philosophy. And, lastly, there was an immense undefined religious movement, ranging from theologies which taught the spirituality of God and of the human soul, down to the most irrational and abject superstition. We saw in the last chapter how, corresponding to this environment, there was a revived Platonism, that Platonism was in fact the fashionable philosophy of that age, just as it afterwards became the fashionable philosophy of another Renaissance thirteen centuries later. But it was a Platonism with the backbone of the system taken out. Plato��s thoughts all centred in a carefully considered scheme for the moral and political regeneration of society. Now, with the destruction of Greek independence, and the absorption everywhere of free city-states into a vast military empire, it might seem as if the realisation of such a scheme had become altogether impracticable. The Republic was, indeed, at that moment realising itself under a form adapted to the altered exigencies of the time; but no Platonist could as yet recognise272 in the Christian Church even an approximate fulfilment of his master��s dream. Failing any practical issue, there remained the speculative side of Plato��s teaching. His writings did not embody a complete system, but they offered the materials whence a system could be framed. Here the choice lay between two possible lines of construction; and each had, in fact, been already attempted by his own immediate disciples. One was the Pythagorean method of the Old Academy, what Aristotle contemptuously called the conversion of philosophy into mathematics. We saw in the last chapter how the revived Platonism of the first and second centuries entered once more on the same perilous path, a path which led farther and farther away from the true principles of Greek thought, and of Plato himself when his intellect stood at its highest point of splendour. Neo-Pythagorean mysticism meant an unreconciled dualism of spirit and matter; and as the ultimate consequence of that dualism, it meant the substitution of magical incantations and ceremonial observances for the study of reason and virtue. Moreover, it readily allied itself with Oriental beliefs, which meant a negation of natural law that the Greeks could hardly tolerate, and, under the form of Gnostic pessimism, a belief in the inherent depravity of Nature that they could not tolerate at all.

TWO: PREFACEINTRODUCTION.

TWO:If now, abandoning all technicalities, we endeavour to estimate the significance and value of the most general ideas contributed by Stoicism to ethical speculation, we shall find that they may be most conveniently considered under the following heads. First of all, the Stoics made morality completely inward. They declared that the intention was equivalent to the deed, and that the wish was equivalent to the32 intention��a view which has been made familiar to all by the teaching of the Gospel, but the origin of which in Greek philosophy has been strangely ignored even by rationalistic writers.74 From the inaccessibility of motives and feelings to direct external observation, it follows that each man must be, in the last resort, his own judge. Hence the notion of conscience is equally a Stoic creation. That we have a mystical intuition informing us, prior to experience, of the difference between right and wrong is, indeed, a theory quite alien to their empirical derivation of knowledge. But that the educated wrong-doer carries in his bosom a perpetual witness and avenger of his guilt, they most distinctly asserted.75 The difference between ancient and modern tragedy is alone sufficient to prove the novelty and power of this idea; for that the Eumenides do not represent even the germ of a conscience is as certain as anything in mythology can be.7633 On the other hand, the fallibility of conscience and the extent to which it may be sophisticated were topics not embraced within the limits of Stoicism, and perhaps never adequately illustrated by any writer, even in modern times, except the great English novelist whose loss we still deplore.It was a puzzling one, too. Every policeman who had been on night duty in Lytton Avenue for months was closely examined. Once or twice a night the doors of the house had been tried without effect. Nobody had ever been seen to come away or enter. No suspicious characters had been seen loafing about. Not one of the officers had ever seen a light in the place.

TWO:The difference between how machinery is constructed and why it is so constructed, is a wide one. This difference the reader should keep in mind, because it is to the second query that the present work will be mainly addressed. There will be an attempt��an imperfect one, no doubt, in some cases��to deduce from practice the causes which have led to certain forms of machines, and to the ordinary processes of workshop manipulation. In the mind of a learner, whether apprentice or student, the strongest tendency is to investigate why certain proportions and arrangement are right and others wrong��why the operations of a workshop are conducted in one manner instead of another? This is the natural habit of thought, and the natural course of inquiry and investigation is deductive.60

TWO:Or, again, we may say that two principles,��the Nominalistic as well as the Realistic,��are here at work. By virtue of the one, Spinoza makes Being something beyond and above the facts of experience. By virtue of the other he reinvests it with concrete reality, but a reality altogether transcending our powers of imagination. Very much, also, that Plotinus says about his One might be applied to Spinoza��s Substance, but with a new and positive meaning. The First Cause is above existence, but only existence as restricted within the very narrow limits of our experience, and only as infinite reality transcends the parts which it includes.

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TWO:Power derived from water by means of wheels is due to the gravity of the water in descending from a higher to a lower level; but the question arises, What has heat to do with this? If heat is the source of power, and power a product of heat, there must be a connection somewhere between heat and the descent of the water. Water, in descending from one level to another, can give out no more power than was consumed in raising it to the higher level, and this power employed to raise the water is found to be heat. Water is evaporated by heat of the sun, expanded until it is lighter than the atmosphere, rises through the air, and by condensation falls in the form of rain over the earth's surface; then drains into the ocean through streams and rivers, to again resume its round by another course of evaporation, giving out in its descent power that we turn to useful account by means of water-wheels. This principle of evaporation is continually going on; the fall of rain is likewise quite constant, so that streams are maintained within a sufficient regularity to be available for operating machinery.

TWO:CHAPTER IIIHis signal, relayed through Dick and Sandy to Jeff, shifted the gently banked curve into a straighter line and swiftly the lines of the oncoming craft, miles away, became clear.