ONE:Finally, by the form which he gave to Platonism, Plotinus has had a large share in determining the direction of modern metaphysics. Although, as we have seen, not, properly speaking, a pantheist himself, he showed how the ideal theory could be transformed into a pantheistic system, and pantheism it immediately became when the peculiar limitations and subtleties of Greek thought had ceased to dominate over the western mind, and when the restraints of Catholic orthodoxy had been removed or relaxed. The stream of tendency in this direction runs all through the Middle Ages, and acquires new volume and momentum at the Renaissance, until, by a process which will be analysed in the next chapter, it reaches its supreme expansion in the philosophy of Spinoza. Then, after a long pause, it is taken up by Kants successors, and combined with the subjective idealism of modern psychology, finally passing, through the intervention of Victor Cousin and Sir William Hamilton, into the philosophy of Mr. Herbert Spencer.The noble spirit of Marcus Aurelius was, indeed, proof against such temptations: and he had far more to dread than to hope from the unlightened voice of public opinion; but to him also, standing between two eternities, Nature presented herself chiefly under the aspect of an overwhelming and absorbing Power. Pleasure is not so much dangerous as worthless, weak, and evanescent. Selfishness, pride, anger, and discontent will soon be swept into abysmal gulfs of oblivion by the roaring cataract of change. Universal history is one long monotonous procession of phantasms passing over the scene into death and utter night. In one short life we may see all that ever was, or is, or is to be; the same pageant has already been and shall be repeated an infinite number of times. Nothing endures but the process of unending renovation: we must die that the world may be ever young. Death itself only reunites us with the absolute All whence we come, in which we move, and whither we return.103 But the imperial47 sage makes no attempt to explain why we should ever have separated ourselves from it in thought; or why one life should be better worth living than another in the universal vanity of things.