_a._ The fully worked-out and genuine dialectic is, however, contained in the Parmenides—that most famous masterpiece of Platonic dialectic. Parmenides and Zeno are there represented as meeting Socrates in Athens; but the most important part of it is the dialectic which is put in the mouths of Parmenides and Zeno. At the very beginning the nature of this dialectic is given in detail as follows: Plato makes Parmenides praise Socrates thus: “I notice that in conversing with Aristoteles,” (one of those present; it might quite well have been the philosopher, but that he was born sixteen years after Socrates’ death) “you were trying to define in what the nature of the beautiful, just and good, and all such ideas lay. This your endeavour is noble and divine. But train and exercise yourself even more in what the multitude call idle chatter, and look on as useless, as long as you are young, for otherwise the truth will escape you.—In what, Socrates asks, does this exercise consist?—I was much pleased because you said before that we must not be content with contemplating the sensuous and its illusions, but must consider that which thought alone can grasp, and that which alone exists.” I have before[31] remarked that men at all times have believed that the truth could be found through reflection only, for in reflection thought is found, and that which we have before us in the guise of ordinary conception and of belief is transformed into thought. Socrates now replies to Parmenides: “I believed that I should in that way best discern the like and unlike, and the other general determinations in things.” Parmenides replies, “Certainly. But if you begin from a point of view such as that, you must not only consider what follows from such an hypothesis, but also what follows from the opposite of that hypothesis. For example, in the case of the hypothesis ‘the many is,’ you have to consider what will be the consequences of the relation of the many to itself and to the one, and likewise what the consequences of the relation of the one to itself and to the many.” The marvellous fact that meets us in thought when we take determinations such as these by themselves, is that each one is turned round into the opposite of itself. “But again we must consider, if the many is not, as to what will be the result as regards the one and the many, both to themselves and to one another. The same consideration must be employed in respect of identity and non-identity, rest and motion, origination and passing away, and likewise in regard to Being and non-being. We must ask what is each of these in relation to itself, and what is their relation in event of the one or the other being accepted? In exercising yourself fully in this, you will learn to know real truth.”[32] Plato thus lays great stress on the dialectical point of view, which is not the point of view of the merely external, but is a living point of view whose content is formed of pure thoughts