In the preceding chapter we traced the rise and progress of physical philosophy among the ancient Greeks. We showed how a few great thinkers, borne on by an unparalleled development of intellectual activity, worked out ideas respecting the order of nature and the constitution of matter which, after more than two thousand years, still remain as fresh and fruitful as ever; and we found that, in achieving these results, Greek thought was itself determined by ascertainable laws. Whether controlling artistic imagination or penetrating to the objective truth of things, it remained always essentially homogeneous, and worked under the same forms of circumscription, analysis, and opposition. It began with external nature, and with a far distant past; nor could it begin otherwise, for only so could the subjects of its later meditations be reached. Only after less sacred beliefs have been shaken can ethical dogmas be questioned. Only when discrepancies of opinion obtrude themselves on man’s notice is the need of an organising logic experienced. And the mind’s eye, originally focussed for distant objects alone, has to be gradually restricted in its range by the pressure of accumulated experience before it can turn from past to present, from successive to contemporaneous phenomena. We have now to undertake the not less interesting task of showing how the new culture, the new conceptions, the new power to think obtained through those earliest speculations, reacted on the life from which they sprang, transforming the moral, religious, and political creeds of Hellas, and preparing, as nothing else could prepare, the vaster revolution which has given a new dignity to existence, and substituted, in however imperfect a form, for the adoration of animalisms which lie below man, the adoration of an ideal which rises above him, but only personifies the best elements of his own nature, and therefore is possible for a perfected humanity to realise.