If there had been no discussion of principle in Greece, probably she would still have produced works of art. Homer contains no such discussion. The speeches in the 'Iliad,' which Mr. Gladstone, the most competent of living judges, maintains to be the finest ever composed by man, are not discussions of principle. There is no more tendency in them to critical disquisition than there is to political economy. In Herodotus you have the beginning of the age of discussion. He belongs in his essence to the age which is going out. He refers with reverence to established ordinance and fixed religion. Still, in his travels through Greece, he must have heard endless political arguments; and accordingly you can find in his book many incipient traces of abstract political disquisition. The discourses on democracy, aristocracy, and monarchy, which he puts into the mouth of the Persian conspirators when the monarchy was vacant, have justly been called absurd, as speeches supposed to have been spoken by those persons. No Asiatic ever thought of such things. You might as well imagine Saul or David speaking them, as those to whom Herodotus attributes them. They are Greek speeches, full of free Greek discussion, and suggested by the experience, already considerable, of the Greeks in the results of discussion. The age of debate is beginning, and even Herodotus, the least of a wrangler of any man, and the most of a sweet and simple narrator, felt the effect. When we come to Thucydides, the results of discussion are as full as they have ever been; his light is pure, 'dry light,' free from the 'humours' of habit, and purged from consecrated usage. As Grote's history often reads like a report to Parliament, so half Thucydides reads like a speech, or materials for a speech, in the Athenian Assembly. Of later times it is unnecessary to speak. Every page of Aristotle and Plato bears ample and indelible trace of the age of discussion in which they lived; and thought cannot possibly be freer. The deliverance of the speculative intellect from traditional and customary authority was altogether complete.