The delineation of Socrates in the Republic is not wholly consistent. In the first book we have more of the real Socrates, such as he is depicted in the Memorabilia of Xenophon, in the earliest Dialogues of Plato, and in the Apology. He is ironical, provoking, questioning, the old enemy of the Sophists, ready to put on the mask of Silenus as well as to argue seriously. But in the sixth book his enmity towards the Sophists abates; he acknowledges that they are the representatives rather than the corrupters of the world (vi. 492 A). He also becomes more dogmatic and constructive, passing beyond the range either of the political or the speculative ideas of the real Socrates. In one passage (vi. 506 C) Plato himself seems to intimate that the time had now come for Socrates, who had passed his whole life in philosophy, to give his own opinion and not to be always repeating the notions of other men. There is no evidence that either the idea of good or the conception of a perfect state were comprehended in the Socratic teaching, though he certainly dwelt on the nature of the universal and of final causes (cp. Xen. Mem. i. 4; Phaedo 97); and a deep thinker like him, in his thirty or forty years of public teaching, could hardly have failed to touch on the nature of family relations, for which there is also some positive evidence in the Memorabilia (Mem. i. 2, 51 foll.). The Socratic method is nominally retained; and every inference is either put into the mouth of the respondent or represented as the common discovery of him and Socrates. But any one can see that this is a mere form, of which the affectation grows wearisome as the work advances. The method of enquiry has passed into a method of teaching in which by the help of interlocutors the same thesis is looked at from various points of view. The nature of the process is truly characterized by Glaucon, when he describes himself as a companion who is not good for much in an investigation, but can see what he is shown (iv. 432 C), and may, perhaps, give the answer to a question more fluently than another (v. 474 A; cp. 389 A).