Leaving them for the present, let us enquire what we mean by giving many names to the same thing, e.g. white, good, tall, to man; out of which tyros old and young derive such a feast of amusement. Their meagre minds refuse to predicate anything of anything; they say that good is good, and man is man; and that to affirm one of the other would be making the many one and the one many. Let us place them in a class with our previous opponents, and interrogate both of them at once. Shall we assume (1) that being and rest and motion, and all other things, are incommunicable with one another? or (2) that they all have indiscriminate communion? or (3) that there is communion of some and not of others? And we will consider the first hypothesis first of all.
(1) If we suppose the universal separation of kinds, all theories alike are swept away; the patrons of a single principle of rest or of motion, or of a plurality of immutable ideas—all alike have the ground cut from 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 whatnot. 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
