FORE:A learner will no doubt wonder why sand is used for moulding, instead of some more adhesive material like clay. If he is not too fastidious for the experiment, and will apply a lump of damp moulding sand to his mouth and blow his breath through the mass, the query will be solved. If it were not for the porous nature of sand-moulds they would be blown to pieces as soon as the hot metal entered them; not only because of the mechanical expansion of the gas, but often from explosion by combustion. Gas jets from moulds, as may be seen at any time when castings are poured, will take fire and burn the same as illuminating gas.After Apuleius, Platonism, outside the lecture rooms of Athens, becomes identified with Pythagoreanism, and both with dogmatic theology. In this direction, philosophy was feeling its way towards a reconciliation with two great Oriental religions, Hebrew monotheism and Medo-Persian dualism. The first advances had come from religion. Aristobulus, an Alexandrian Jew (B.C. 160), was apparently the first to detect an analogy between the later speculations of Plato and his own hereditary faith. Both taught that the world had been created by a single supreme God. Both were penetrated with the purest ethical ideas. Both associated sensuality and idolatry in the same vehement denunciations. The conclusion was obvious. What had been supernaturally revealed to the chosen people could not have been discovered elsewhere by a simple exercise of human reason. Plato must have borrowed his wisdom from Moses.398 At a later period, the celebrated Philo, following up the clue thus furnished, proceeded to evolve the whole of Greek philosophy from the Pentateuch. An elaborate system of allegorical interpretation, borrowed from the Stoics, was the instrument with which he effected his enterprise. The result was what might have been foreseena complete Hellenisation of Hebrew religion.257 Circumscription, antithesis, and mediation were, as we know, the chief moments of Greek thought. Philo rearranged his monotheistic system according to the scheme which they supplied. He first determined the divine unity with such logical precision as to place God out of relation to the world. Then, in the true Greek spirit, he placed at the other end of his metaphysical scale matterthe shifting, formless, shadowy residuum left behind when every ideal element has been thought away from the world. So conceived, matter became, what it had been to Plato, the principle of all evil, and therefore something with which God could not possibly be brought into contact. Accordingly, the process of creation is made intelligible by the interposition of a connecting link in the shape of certain hypostasised divine attributes or forces, represented as at the same time belonging to and distinct from the divine personality. Of these the most important are the goodness to which the world owes its origin, and the power by which it is governed. Both are united in the Logos or Word. This last ideawhich, by the way, was derived not from Plato but from the Stoicssums up in itself the totality of mediatorial functions by which God and the world are put into communication with one another. In like manner, Plato had interposed a universal soul between his Ideas and the world of sensible appearances, and had pointed to an arrangement of the Ideas themselves by which we could ascend in thought to a contemplation of the absolute good. There seems, however, to be a difference between the original Hellenic conception and the same conception as adapted to Oriental ways of thinking. With Plato, as with every other Greek philosopher, a mediator is introduced not for the purpose of representing the supreme ideal to us nor of transmitting our aspirations to it, but of guiding and facilitating our approach to it, of helping us to a perfect apprehension and realisation of its meaning. With Philo, on the contrary, the relation of the Logos to God is much the same as that of258 a Grand Vizier to an Oriental Sultan. And, from this point of view, it is very significant that he should compare it to the high-priest who lays the prayers of the people before the eternal throne, especially when we couple this with his declaration that the Logos is the God of us imperfect beings, the first God being reserved for the contemplation of those who are wise and perfect.399
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