THREE:Plotinus passes by an almost insensible transition from the more elementary and analytical to the more constructive portion of his philosophy. This naturally falls into two great divisions, the one speculative and the other practical. It has to be shown by what necessity and in what order the great cosmic principles are evolved from their supreme source; and it has also to be shown in what way this knowledge is connected with the supreme interests of the human soul. The moral aspect of Neo-Platonism is not at first very clearly distinguished from its metaphysical aspect; and both find their most general solution in the same line of thought that has led us up to a contemplation of the ultimate One. For the successive gradations of our ascent represent, in an inverted order, the steps of creative energy by which all things are evolved from their primal source; while they directly correspond to the process of purification through which every soul must pass in returning from the exile of her separate and material existence to the happiness of identification with God. And here we at once come on the fundamental contradiction of the system. What we were so carefully taught to consider as one and nothing more, must now be conceived as the first cause and the supreme good. Plotinus does, indeed, try to evade the difficulty by saying that his absolute is only318 a cause in relation to other things, that it is not so much good as the giver of good, that it is only one in the sense of not being many.468 But after making these reservations, he continues to use the old terms as confidently as if they stood for the ideas usually associated with them. His fundamental error was to identify three distinct methods of connecting phenomena, in thought, with each other or with ourselves. We may view things in relation to their generating antecedents, in relation to other things with which they are associated by resemblance or juxtaposition, or in relation to the satisfaction of our own wants. These three modes of reference correspond to Aristotles efficient, formal, and final causes; but the word causation should be applied only to the first. Whether their unfortunate confusion both by Aristotle and by his successors was in any appreciable degree due to their having been associated by him under a common denomination, may reasonably be doubted. It is rather more probable that the same name was given to these different conceptions in consequence of their having first become partially identified in thought. Social arrangements, which have a great deal to do with primitive speculation, would naturally lead to such an identification. The king or other chief magistrate stands at the head of the social hierarchy and forms the bond of union among its members; he is the source of all authority; and his position, or, failing that, his favour, is regarded as the supreme good. Religion extends the same combination of attributes to her chief God; and philosophy, following on the lines of religion, employs it to unify the methods of science and morality.An engine lathe is for many reasons called the master tool in machine fitting. It is not only the leading tool so far as performing a greater share of the work; but an engine lathe as an organised machine combines, perhaps, a greater number of useful and important functions, than any machine which has ever been [122] devised. A lathe may be employed to turn, bore, drill, mill, or cut screws, and with a strong screw-feed may be employed to some extent for planing; what is still more strange, notwithstanding these various functions, a lathe is comparatively a simple machine without complication or perishable parts, and requires no considerable change in adapting it to the various purposes named.
