Of the six dialogues composed by Eukleides, we cannot speak positively, because they are not preserved. But they cannot have been more refutative, and less affirmative, than most of the Platonic dialogues; and we can hardly be wrong in asserting that they were very inferior both in energy and attraction. The Theætêtus and the Parmenides, two of the most negative among the Platonic dialogues, seem to connect themselves, by the personnel of the drama, with the Megaric philosophers: the former dialogue is ushered in by Eukleides, and is, as it were, dedicated to him: the latter dialogue exhibits, as its protagonistes, the veteran Parmenides himself, who forms the one factor of the Megaric philosophy, while Sokrates forms the other. Parmenides (in the Platonic dialogue so called) is made to enforce the negative method in general terms, as a philosophical duty co-ordinate with the affirmative; and to illustrate it by a most elaborate argumentation, directed partly against the Platonic Ideas (here advocated by the youthful Sokrates), partly against his own (the Parmenidean) dogma of Ens Unum. Parmenides adduces unanswerable objections against the dogma of Transcendental Forms or Ideas; yet says at the same time that there can be no philosophy unless you admit it. He reproves the youthful Sokrates for precipitancy in affirming the dogma, and contends that you are not justified in affirming any dogma until you have gone through a bilateral scrutiny of it — that is, first assuming the doctrine to be true, next assuming it to be false, and following out the deductions arising from the one assumption as well as from the other.[30] Parmenides then gives a string of successive deductions (at great length, occupying the last half of the dialogue) — four pairs of counter-demonstrations or Antinomies — in which contradictory conclusions appear each to be alike proved. He enunciates the final result as follows:—“Whether Unum exists, or does not exist, Unum itself and Cætera, both exist and do not exist, both appear and do not appear, all things and in all ways — both in relation to themselves and in relation to each other”.[31]
[30] Plato, Parmen. p. 136.
[31] Plato, Parmen. p. 166. ἓν εἴτ’ ἔστιν, εἴτε μὴ ἔστιν, αὐτό τε καὶ τἄλλα καὶ πρὸς αὐτὰ καὶ πρὸς ἄλληλα πάντα πάντως ἐστί τε καὶ οὐκ ἔστι, καὶ φαίνεταί τε καὶ οὐ φαίνεται. — Ἀληθέστατα.
See below, [vol. iii. chap. xxvii. Parmenides].
If this memorable dialogue, with its concluding string of elaborate antinomies, had come down to us under the name of Eukleides, historians would probably have denounced it as a perverse exhibition of ingenuity, worthy of “that litigious person, who first infused into the Megarians the fury of disputation”.[32] But since it is of Platonic origin, we must recognise Plato not only as having divided with the Megaric philosophers the impulse of negative speculation which they had inherited from Sokrates, but as having carried that impulse to an extreme point of invention, combination, and dramatic handling, much beyond their powers. Undoubtedly, if we pass from the Parmenidês to other dialogues, we find Plato very different. He has various other intellectual impulses, an abundant flow of ideality and of constructive fancy, in many distinct channels. But negative philosophy is at least one of the indisputable and prominent items of the Platonic aggregate.
[32] This is the phrase of the satirical sillographer Timon, who spoke with scorn of all the philosophers except Pyrrhon:—
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Ἀλλ’ οὔ μοι τούτων φλεδόνων μέλει, οὐδὲ
μὲν ἄλλου Οὐδενός, οὐ Φαίδωνος, ὅτις γε μὲν — οὔδ’ ἐριδάντεω Εὐκλείδου, Μεγαρεῦσιν ὃς ἔμβαλε λύσσαν ἐρισμοῦ. |
The Megarics shared the negative impulse with Sokrates and Plato.
While then we admit that the Megaric succession of philosophers exhibited negative subtlety and vehement love of contentious debate, we must recollect that these qualities were inherited from Sokrates and shared with Plato. The philosophy of Sokrates, who taught nothing and cross-examined every one, was essentially more negative and controversial, both in him and his successors, than any which had preceded it. In an age when dialectic colloquy was considered as appropriate for philosophical subjects, and when long continuous exposition was left to the rhetor — Eukleides established a succession or school[33] which was more distinguished for impugning dogmas of others than for defending dogmas of its own. Schleiermacher and others suppose that Plato in his dialogue Euthydêmus intends to expose the sophistical fallacies of the Megaric school:[34] and that in the dialogue Sophistês, he refutes the same philosophers (under the vague designation of “the friends of Forms”) in their speculations about Ens and Non-Ens. The first of these two opinions is probably true to some extent, though we cannot tell how far: the second of the two is supported by some able critics — yet it appears to me untenable.[35]
[33] If we may trust a sarcastic bon-mot ascribed to Diogenes the Cynic, the contemporary of the viri Sokratici and the follower of Antisthenes, the term σχολὴ was applied to the visitors of Eukleides rather than to those of Plato — καὶ τὴν μὲν Εὐκλείδου σχολὴν ἔλεγε χολήν, τὴν δὲ Πλάτωνος διατριβήν, κατατριβήν. Diog. L. vi. 24.