only, whose movement consists in their making themselves the other of themselves, and thus showing that only their unity is what is truly justified. Plato makes Socrates say, as regards the meaning of the unity of the one and many, “If anyone proved to me that I am one and many, it would not surprise me. For since he shows me that I am a many, and points out in me the right and left side, an upper and lower half, a front and back, I partake of the manifold; and again I partake of unity because I am one of us seven. The case is the same with stone, wood, &c. But if anyone, after determining the simple ideas of similarity and dissimilarity, multiplicity, and unity, rest and movement, and so on, were to show that these in their abstract form admit of admixture and separation, I should be very much surprised.”[33] The dialectic of Plato is, however, not to be regarded as complete in every regard. Though his main endeavour is to show that in every determination the opposite is contained, it can still not be said that this is strictly carried out in all his dialectic movements, for there are often external considerations which exercise an influence in his dialectic. For example, Parmenides says: “Are either of the two parts of the one which is—I mean the One and Being—ever wanting to one another? Is the One ever set free from _being_ a part (τοῦ εἶναι μόριον) and Being set free from the _one_ part (τοῦ ἑνὸς μόριου)? Once more, each part thus possesses both the one and Being, and the smallest part still always consists of these two parts.”[34] In other words: “The one is; from this it follows that the one is not synonymous with ‘is,’ and thus the one and ‘is’ are distinguished. There hence is in the proposition ‘the one is’ a distinction; the many is therefore contained in it, and thus even with the one I express the many.” This dialectic is certainly correct, but it is not quite pure, because it begins from this union of two determinations.