evil, were not evil itself interpreted as the necessary correlative of good, or as a necessary link in the descending manifestations of reality. Moreover, by virtue of his identifying principle, Plato saw in the lowest forms a shadow or reflection of the highest. Hence the many surprises, concessions, and returns to abandoned positions which we find in his later writings. The three moments of Greek thought, circumscription, antithesis, and mediation, work in such close union, or with such bewildering rapidity of alternation, through all his dialectic, that we are never sure whither he is leading us, and not always sure that he knows it himself. In the opening chapter of this work we endeavoured to explain how the Pythagorean philosophy arose out of the intoxicated delight inspired by a first acquaintance with the manifold properties of number and figure. If we would enter into the spirit of Platonism, we must similarly throw ourselves back into the time when the idea of a universal classification first dawned on men’s minds. We must remember how it gratified the Greek love of order combined with individuality; what unbounded opportunities for asking and answering questions it supplied; and what promises of practical regeneration it held out. Not without a shade of sadness for so many baffled efforts and so many blighted hopes, yet also with a grateful recollection of all that reason has accomplished, and with something of his own high intellectual enthusiasm, shall we listen to Plato’s prophetic words—words of deeper import than their own author knew—‘If I find any man who is able to see a One and Many in Nature, him I follow and walk in his steps as if he were a god.’[137] It is interesting to see how the most comprehensive systems of the present century, even when most opposed to the metaphysical spirit, are still constructed on the plan long ago sketched by Plato. Alike in his classification of the sciences, in his historical deductions, and in his plans for the reorganisation of society, Auguste Comte adopts a scheme of ascending or descending generality. The conception of differentiation and integration employed both by Hegel and by Mr. Herbert Spencer is also of Platonic origin; only, what with the ancient thinker was a statical law of order has become with his modern successors a dynamic law of progress; while, again, there is this distinction between the German and the English philosopher, that the former construes as successive moments of the Idea what the latter regards as simultaneous and interdependent processes of evolution. II.