In regard to the habit of correcting compositions, the contrast between Plato and Plotinus was remarkable. Porphyry tells us that Plotinus, when once he had written any matter, could hardly bear even to read it over — much less to review and improve it (Porph. Vit. Plotini, 8).
Hermann’s view more tenable than Schleiermacher’s.
If we compare K. F. Hermann with Schleiermacher, we see that Hermann has amended his position by abandoning Schleiermacher’s gratuitous hypothesis, of a preconceived Platonic system with a canonical order of the dialogues adapted to that system — and by admitting only a chronological order of composition, each dialogue being generated by the state of Plato’s mind at the time when it was composed. This, taken generally, is indisputable. If we perfectly knew Plato’s biography and the circumstances around him, we should be able to determine which dialogues were first, second, and third, &c., and what circumstances or mental dispositions occasioned the successive composition of those which followed. But can we do this with our present scanty information? I think not. Hermann, while abandoning the hypothesis of Schleiermacher, has still accepted the large conditions of the problem first drawn up by Schleiermacher, and has undertaken to decide the real order of the dialogues, together with the special occasion and the phase of Platonic development corresponding to each. Herein, I think, he has failed.
Small number of certainties, or even reasonable presumptions, as to date or order of the dialogues.
It is, indeed, natural that critics should form some impression as to earlier and later in the dialogues. But though there are some peculiar cases in which such impression acquires much force, I conceive that in almost all cases it is to a high degree uncertain. Several dialogues proclaim themselves as subsequent to the death of Sokrates. We know from internal allusions that the Theætêtus must have been composed after 394 B.C., the Menexenus after 387 B.C., and the Symposion after 385 B.C. We are sure, by Aristotle’s testimony, that the Leges were written at a later period than the Republic; Plutarch also states that the Leges were composed during the old age of Plato, and this statement, accepted by most modern critics, appears to me trustworthy.[54] The Sophistês proclaims itself as a second meeting, by mutual agreement, of the same persons who had conversed in the Theætêtus, with the addition of a new companion, the Eleatic stranger. But we must remark that the subject of the Theætêtus, though left unsettled at the close of that dialogue, is not resumed in the Sophistês: in which last, moreover, Sokrates acts only a subordinate part, while the Eleatic stranger, who did not appear in the Theætêtus, is here put forward as the prominent questioner or expositor. So too, the Politikus offers itself as a third of the same triplet: with this difference, that while the Eleatic stranger continues as the questioner, a new respondent appears in the person of Sokrates Junior. The Politikus is not a resumption of the same subject as the Sophistês, but a second application of the same method (the method of logical division and subdivision) to a different subject. Plato speaks also as if he contemplated a third application of the same method — the Philosophus: which, so far as we know, was never realised. Again, the Timæus presents itself as a sequel to the Republic, and the Kritias as a sequel to the Timæus: a fourth, the Hermokrates, being apparently announced, as about to follow — but not having been composed.
[54] Plutarch, Isid. et Osirid. c. 48, p. 370.
Trilogies indicated by Plato himself.
Here then are two groups of three each (we might call them Trilogies, and if the intended fourth had been realised, Tetralogies), indicated by Plato himself. A certain relative chronological order is here doubtless evident: the Sophistês must have been composed after the Theætêtus and before the Politikus, the Timæus after the Republic and before the Kritias. But this is all that we can infer: for it does not follow that the sequence must have been immediate in point of time: there may have been a considerable interval between the three forming the so-called Trilogy.[55] We may add, that neither in the Theætêtus nor in the Republic, do we find indication that either of them is intended as the first of a Trilogy: the marks proving an intended Trilogy are only found in the second and third of the series.
[55] It may seem singular that Schleiermacher is among those who adopt this opinion. He maintains that the Sophistes does not follow immediately upon the Theætêtus; that Plato, though intending when he finished the Theætêtus to proceed onward to the Sophistês, altered his intention, and took up other views instead: that the Menon (and the Euthydêmus) come in between them, in immediate sequel to the Theætêtus (Einleitung zum Menon, vol. iii. p. 326).
Here Schleiermacher introduces a new element of uncertainty, which invalidates yet more seriously the grounds for his hypothesis of a preconceived sequence throughout all the dialogues. In a case where Plato directly intimates an intentional sequence, we are called upon to believe, on “internal grounds” alone, that he altered his intention, and introduced other dialogues. He may have done this: but how are we to prove it? How much does it attenuate the value of his intentions, as proofs of an internal philosophical sequence? We become involved more and more in unsupported hypothesis. I think that K. F. Hermann’s objections against Schleiermacher, on the above ground, have much force; and that Ueberweg’s reply to them is unsatisfactory. (Hermann, Gesch. und Syst. der Platon. Phil. p. 350. Ueberweg, Untersuchungen, p. 82, seq.)