under them; and all creators of the universe by theories of composition and division, whether out of or into a finite or infinite number of elemental forms, in alternation or continuance, share the same fate. Most ridiculous is the discomfiture which attends the opponents of predication, who, like the ventriloquist Eurycles, have the voice that answers them in their own breast. For they cannot help using the words 'is,' 'apart,' 'from others,' and the like; and their adversaries are thus saved the trouble of refuting them. But (2) if all things have communion with all things, motion will rest, and rest will move; here is a reductio ad absurdum. Two out of the three hypotheses are thus seen to be false. The third (3) remains, which affirms that only certain things communicate with certain other things. In the alphabet and the scale there are some letters and notes which combine with others, and some which do not; and the laws according to which they combine or are separated are known to the grammarian and musician. And there is a science which teaches not only what notes and letters, but what classes admit of combination with one another, and what not. This is a noble science, on which we have stumbled unawares; in seeking after the Sophist we have found the philosopher. He is the master who discerns one whole or form pervading a scattered multitude, and many such wholes combined under a higher one, and many entirely apart—he is the true dialectician. Like the Sophist, he is hard to recognize, though for the opposite reasons; the Sophist runs away into the obscurity of not-being, the philosopher is dark from excess of light. And now, leaving him, we will return to our pursuit of the Sophist.

Agreeing in the truth of the third hypothesis, that some things have communion and others not, and that some may have communion with all, let us examine the most important kinds which are capable of admixture; and in this way we may perhaps find out a sense in which not-being may be affirmed to have being. Now the highest kinds are being, rest, motion; and of these, rest and motion exclude each other, but both of them are included in being; and again, they are the same with themselves and the other of each other. What is the meaning of these words, 'same' and 'other'? Are there two more kinds to be added to the three others? For sameness cannot be either rest or motion, because predicated both of rest and motion; nor yet being; because if being were attributed to both of them we should attribute sameness to both of them. Nor can other be identified with being; for then other, which is relative, would have the absoluteness of being. Therefore we must assume a fifth principle, which is universal, and runs through all things, for each thing is other than all other things. Thus there are five principles: (1) being, (2) motion, which is not (3) rest, and because participating both in the same and other, is and is not (4) the same with itself, and is and is not (5) other than the other. And motion is not being, but partakes of being, and therefore is and is not in the most absolute sense. Thus we have discovered that not-being is the principle of the other which runs through all things, being not excepted. And 'being' is one thing, and 'not-being' includes and is all other things. And not-being is not the opposite of being, but only the other. Knowledge has many branches, and the other or difference has as many, each of which is described by prefixing the word 'not' to some kind of knowledge. The not-beautiful is as real as the beautiful, the not-just as the just. And the essence of the not-beautiful is to be separated from and opposed to a certain kind of existence which is termed beautiful. And this opposition and negation is the not-being of which we are in search, and is one kind of being. Thus, in spite of Parmenides, we have not only discovered the existence, but also the nature of not-being—that nature we have found to be relation. In the communion of different kinds, being and other mutually interpenetrate; other is, but is other than being, and other than each and all of the remaining kinds, and therefore in an infinity of ways 'is not.' And the argument has shown that the pursuit of contradictions is childish and useless, and the very opposite of that higher spirit which criticizes the words of another according to the natural meaning of them. Nothing can be more unphilosophical than the denial of all communion of kinds. And we are fortunate in having established such a communion for another reason, because in continuing the hunt after the Sophist we have to examine the nature of discourse, and there could be no discourse if there were no communion. For the Sophist, although he can no longer deny the existence of not-being, may still affirm that not-being cannot enter into discourse, and as he was arguing before that there could be no such thing as falsehood, because there was no such thing as not-being, he may continue to argue that there is no such thing as the art of image-making and phantastic, because not-being has no place in language. Hence arises the necessity of examining speech, opinion, and imagination.

And first concerning speech; let us ask the same question about words which we have already answered about the kinds of being and the letters of the alphabet: To what extent do they admit of combination? Some words have a meaning when combined, and others have no meaning. One class of words describes action, another class agents: 'walks,' 'runs,' 'sleeps' are examples of the first; 'stag,' 'horse,' 'lion' of the second. But no combination of words can be formed without a verb and a noun, e.g. 'A man learns'; the simplest sentence is composed of two words, and one of these must be a subject. For example, in the sentence, 'Theaetetus sits,' which is not very long, 'Theaetetus' is the subject, and in the sentence 'Theaetetus flies,' 'Theaetetus' is again the subject. But the two sentences differ in quality, for the first says of you that which is true, and the second says of you that which is not true, or, in other words, attributes to you things which are not as though they were. Here is false discourse in the shortest form. And thus not only speech, but thought and opinion and imagination are proved to be both true and false. For thought is only the process of silent speech, and opinion is only the silent assent or denial which follows this, and imagination is only the expression of this in some form of sense. All of them are akin to speech, and therefore, like speech, admit of true and false. And we have discovered false opinion, which is an encouraging sign of our probable success in the rest of the enquiry.

Then now let us return to our old division of likeness-making and phantastic. When we were going to place the Sophist in one of them, a doubt arose whether there could be such a thing as an appearance, because there was no such thing as falsehood. At length falsehood has been discovered by us to exist, and we have acknowledged that the Sophist is to be found in the class of imitators. All art was divided originally by us into two branches—productive and acquisitive. And now we may divide both on a different principle into the creations or imitations which are of human, and those which are of divine, origin. For we must admit that the world and ourselves and the animals did not come into existence by chance, or the spontaneous working of nature, but by divine reason and knowledge. And there are not only divine creations but divine imitations, such as apparitions and shadows and reflections, which are equally the work of a divine mind. And there are human creations and human imitations too,—there is the actual house and the drawing of it. Nor must we forget that image-making may be an imitation of realities or an imitation of appearances, which last has been called by us phantastic. And this phantastic may be again divided into imitation by the help of instruments and impersonations. And the latter may be either dissembling or unconscious, either with or without knowledge. A man cannot imitate you,