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THREE:It is generally useless and injudicious to either expect or to search after radical changes or sweeping improvements in machine manufacture or machine application, but it is important in learning how to construct and apply machinery, that the means of foreseeing what is to come in future should at the same time be considered. The attention of a learner can, for example, be directed to the division of labour, improvements in shop system, how and where commercial interests are influenced by machinery, what countries are likely to develop manufactures, the influence of steam-hammers on forging, the more extended use of steel when cheapened by improved processes for producing it, the division of mechanical industry into special branches, what kind of machinery may become staple, such as shafts, pulleys, wheels, and so on. These things are mentioned at random, to indicate what is meant by looking into the future as well as at the present.In fixing the relation of Plotinus to his own age, we have gone far towards fixing his relation to all ages, the place which350 he occupies in the development of philosophy as a connected whole. We have seen that as an attempt to discover the truth of things, his speculations are worthless and worse than worthless, since their method no less than their teaching is false. Nevertheless, Wisdom is justified of all her children. Without adding anything to the sum of positive knowledge, Plotinus produced an effect on men��s thoughts not unworthy of the great intellect and pure life which he devoted to the service of philosophy. No other thinker has ever accomplished a revolution so immediate, so comprehensive, and of such prolonged duration. He was the creator of Neo-Platonism, and Neo-Platonism simply annihilated every school of philosophy to which it was opposed. For thirteen centuries or more, the three great systems which had so long divided the suffrages of educated minds��Stoicism, Epicureanism, and Scepticism��ceased to exist, and were allowed to lapse into such complete oblivion that only a few fragments of the works in which they were originally embodied have been preserved. And Plotinus was enabled to do this by the profound insight which led him to strike less at any particular doctrine held by his opponents than at the common foundation on which they all stood, the materialism openly professed by the Stoics and Epicureans, and assumed by the Sceptics as the necessary presupposition of every dogmatic philosophy. It is true that the principle which he opposed to theirs was not of his own origination, although he stated it more powerfully than it had ever been stated before. But to have revived the spiritualism of Plato and Aristotle in such a way as to win for it universal acceptance, was precisely his greatest merit. It is also the only one that he would have claimed for himself. As we have already mentioned, he professed to be nothing more than the disciple of Plato. And although Aristotelian ideas abound in his writings, still not only are they overbalanced by the Platonic element, but Plotinus might justly have contended that they also belong, in a sense, to Plato,351 having been originally acquired by a simple development from his teaching.