To Socrates himself the strongest reason for believing in the identity of conviction and practice was, perhaps, that he had made it a living reality. With him to know the right and to do it were the same. In this sense we have already said that his life was the first verification of his philosophy. And just as the results of his ethical teaching can only be ideally separated from their application to his conduct, so also these results themselves cannot be kept apart from the method by which they were reached; nor is the process by which he reached them for himself distinguishable from the process by which he communicated them to his friends. In touching on this point, we touch on that which is greatest and most distinctively original in the Socratic system, or rather in the Socratic impulse to systematisation of every kind. What it was will be made clearer by reverting to the central conception of mind. With Protagoras mind meant an ever-changing stream of feeling; with Gorgias it was a principle of hopeless isolation, the interchange of thoughts between one consciousness and another, by means of signs, being an illusion. Socrates, on the contrary, attributed to it a steadfast control over passion, and a unifying function in society through its essentially synthetic activity, its need of co-operation and responsive assurance. He saw that the reason which overcomes animal desire tends to draw men together just as sensuality tends to drive them into hostile collision. If he recommended temperance on account of the increased egoistic pleasure which it secures, he recommended it also as making the individual a more efficient instrument for serving the community. If he inculcated obedience to the established laws, it was no doubt partly on grounds of enlightened self-interest, but also because union and harmony among citizens were thereby secured. And if he insisted on the necessity of forming definite conceptions, it was with the same twofold reference to personal and public advantage. Along with the diffusive, social character of mind he recognised its essential spontaneity. In a commonwealth where all citizens were free and equal, there must also be freedom and equality of reason. Having worked out a theory of life for himself, he desired that all other men should, so far as possible, pass through the same bracing discipline. Here we have the secret of his famous erotetic method. He did not, like the Sophists, give continuous lectures, nor profess, like some of them, to answer every question that might be put to him. On the contrary, he put a series of questions to all who came in his way, generally in the form of an alternative, one side of which seemed self-evidently true and the other self-evidently false, arranged so as to lead the respondent, step by step, to the conclusion which it was desired that he should accept. Socrates did not invent this method. It had long been practised in the Athenian law-courts as a means for extracting from