Vitae philosophorum
Diogenes Laertius
Diogenes Laertius. Hicks, R. D., editor. Cambridge, MA.: Harvard University Press; London: William Heinemann Ltd., 1925.
and in this Polemo agrees. Sabinus makes Demosthenes his pupil, quoting, in the fourth book of his Materials for Criticism, Mnesistratus of Thasos as his authority. And it is not improbable.[*](Here begins the first of three appendices, being an introduction to the study of the Platonic writings (47-66). Freudenthal, in Hell. Stud. iii., has shown that the extant fragment of the Πρόλογος of Albinus is similar and probably derived from the same source. Albinus lived in the second century a.d., for in 151-2 Galen was his pupil in Smyrna. The reader will note the careful style of the preface with its avoidance of hiatus. In x. 29 is a similar personal appeal to the reader.)
Now, as you are an enthusiastic Platonist, and rightly so, and as you eagerly seek out that philosopher’s doctrines in preference to all others, I have thought it necessary to give some account of the true nature of his discourses, the arrangement of the dialogues, and the method of his inductive procedure, as far as possible in an elementary manner and in main outline, in order that the facts I have collected respecting his life may not suffer by the omission of his doctrines. For, in the words of the proverb, it would be taking owls to Athens, were I to give you of all people the full particulars.
They say that Zeno the Eleatic was the first to write dialogues. But, according to Favorinus in his Memorabilia, Aristotle in the first book of his dialogue On Poets asserts that it was Alexamenus of Styra or Teos. In my opinion Plato, who brought this form of writing to perfection, ought to be adjudged the prize for its invention as well as for its embellishment. A dialogue is a discourse consisting of question and answer on some philosophical or political subject, with due regard to the characters of the persons introduced and the choice of diction. Dialectic is the art of discourse by which we either refute or establish some proposition by means of question and answer on the part of the interlocutors.
Of the Platonic dialogues there are two most general types, the one adapted for instruction and the other for inquiry. And the former is further divided into two types, the theoretical and the practical. And of these the theoretical is divided into the physical and logical, and the practical into the ethical and political. The dialogue of inquiry also has two main divisions, the one of which aims at training the mind and the other at victory in controversy. Again, the part which aims at training the mind has two subdivisions, the one akin to the midwife’s art, the other merely tentative. And that suited to controversy is also subdivided into one part which raises critical objections, and another which is subversive of the main position.
I am not unaware that there are other ways in which certain writers classify the dialogues. For some dialogues they call dramatic, others narrative, and others again a mixture of the two. But the terms they employ in their classification of the dialogues are better suited to the stage than to philosophy. Physics is represented by the Timaeus, logic by the Statesman, Cratylus, Parmenides and Sophist, ethics by the Apology, Crito, Phaedo, Phaedrus and Symposium, as well as by the Menexenus, Clitophon, the Epistles, Philebus, Hipparchus and the Rivals, and lastly politics by the Republic, the Laws, Minos, Epinomis, and the dialogue concerning Atlantis.[*](i.e.Critias.)
To the class of mental obstetrics belong the two Alcibiades, Theages, Lysis and Laches, while the Euthyphro, Meno, Io, Charmides and Theaetetus illustrate the tentative method. In the Protagoras is seen the method of critical objections; in the
Again, as there is great division of opinion between those who affirm and those who deny that Plato was a dogmatist, let me proceed to deal with this further question. To be a dogmatist in philosophy is to lay down positive dogmas, just as to be a legislator is to lay down laws. Further, under dogma two things are included, the thing opined and the opinion itself.
Of these the former is a proposition, the latter a conception. Now where he has a firm grasp Plato expounds his own view and refutes the false one, but, if the subject is obscure, he suspends judgement. His own views are expounded by four persons, Socrates, Timaeus, the Athenian Stranger,[*](In the Laws.) the Eleatic Stranger.[*](In the Sophist and the Statesman.) These strangers are not, as some hold, Plato and Parmenides, but imaginary characters without names,[*](That the Eleatic Stranger is not Parmenides is decisively proved by Soph. 241 e.) for, even when Socrates and Timaeus are the speakers, it is Plato’s doctrines that are laid down. To illustrate the refutation of false opinions, he introduces Thrasymachus, Callicles, Polus, Gorgias, Protagoras, or again Hippias, Euthydemus and the like.
In constructing his proofs he makes most use of induction, not always in the same way, but under two forms. For induction is an argument which by means of certain true premisses properly infers a truth resembling them. And there are two kinds of induction, the one proceeding by way of contradiction, the other from agreement. In the kind which proceeds by contradiction the answer given to every question will necessarily be the contrary of the
And again: If man is not an animal, he will be either a stick or a stone. But he is not a stick or a stone; for he is animate and self-moved. Therefore he is an animal. But if he is an animal, and if a dog or an ox is also an animal, then man by being an animal will be a dog and an ox as well. This is the kind of induction which proceeds by contradiction and dispute, and Plato used it, not for laying down positive doctrines but for refutation. The other kind of induction by agreement appears in two forms, the one proving the particular conclusion under discussion from a particular, the other proceeding by way of the universal [by means of particular facts]. The former is suited to rhetoric, the latter to dialectic. For instance, under the first form the question is raised, Did so-and-so commit a murder? The proof is that he was found at the time with stains of blood on him.
This is the rhetorical form of induction, since rhetoric also is concerned with particular facts and not with universals. It does not inquire about justice in the abstract, but about particular cases of justice. The other kind, where the general proposition is first established by means of particular facts, is the induction of dialectic. For instance, the question put is whether the soul is immortal, and whether the living come back from the dead. And this is proved in the dialogue On the Soul by means of a certain general proposition, that opposites proceed
But, just as long ago in tragedy the chorus was the only actor, and afterwards, in order to give the chorus breathing space, Thespis devised a single actor, Aeschylus a second, Sophocles a third, and thus tragedy was completed, so too with philosophy: in early times it discoursed on one subject only, namely physics, then Socrates added the second subject, ethics, and Plato the third, dialectics, and so brought philosophy to perfection. Thrasylus says that he published his dialogues in tetralogies, like those of the tragic poets. Thus they contended with four plays at the Dionysia, the Lenaea, the Panathenaea and the festival of Chytri.[*](Pots.) Of the four plays the last was a satiric drama; and the four together were called a tetralogy.
Now, says Thrasylus, the genuine dialogues are fifty-six in all, if the Republic be divided into ten and the Laws into twelve. Favorinus, however, in the second book of his Miscellaneous History declares that nearly the whole of the Republic is to be found in a work of Protagoras entitled Controversies.[*](From iii. 37 we infer that Favorinus drew upon Aristoxenus for this wildly improbable assertion.) This gives nine tetralogies, if the Republic takes the place of one single work and the Laws of another. His first tetralogy has a common plan underlying it, for he wishes to describe what the life of the philosopher
This tetralogy, then, which is the first, begins with the Euthyphro or On Holiness, a tentative dialogue; the Apology of Socrates, an ethical dialogue, comes second; the third is Crito or On what is to be done, ethical; the fourth Phaedo or On the Soul, also ethical. The second tetralogy begins with Cratylus or On Correctness of Names, a logical dialogue, which is followed by Theaetetus or On Knowledge, tentative, the Sophist or On Being, a logical dialogue, the Statesman or On Monarchy, also logical. The third tetralogy includes, first, Parmenides or On Ideas, which is logical, next Philebus or On Pleasure, an ethical dialogue, the Banquet or On the Good, ethical, Phaedrus or On Love, also ethical.
The fourth tetralogy starts with Alcibiades or On the Nature of Man, an obstetric dialogue; this is followed by the second Alcibiades or On Prayer, also obstetric; then comes Hipparchus or The Lover of Gain, which is ethical, and The Rivals or On Philosophy, also ethical. The fifth tetralogy includes, first, Theages or On Philosophy, an obstetric dialogue, then Charmides or On Temperance, which is tentative, Laches or On Courage, obstetric, and Lysis or On Friendship, also obstetric. The sixth tetralogy starts with Euthydemus or The Eristic, a refutative dialogue, which is followed by Protagoras or Sophists, critical, Gorgias or On Rhetoric, refutative, and Meno or On Virtue, which is tentative.
The seventh tetralogy contains, first, two dialogues entitled Hippias, the former On Beauty, the latter On Falsehood, both refutative; next Ion or On the Iliad, which is tentative,
In these epistles his heading was Welfare, as that of Epicurus was A Good Life, and that of Cleon All Joy. They comprise: one to Aristodemus, two to Archytas, four to Dionysius, one to Hermias, Erastus and Coriscus, one each to Leodamas, Dion and Perdiccas, and two to Dion’s friends. This is the division adopted by Thrasylus and some others.
Some, including Aristophanes the grammarian, arrange the dialogues arbitrarily in trilogies.
In the first trilogy they place the Republic, Timaeus and Critias; in the second the Sophist, the Statesman and Cratylus; in the third the Laws, Minos and Epinomis; in the fourth Theaetetus, Euthyphro and the Apology; in the fifth Crito, Phaedo and the Epistles. The rest follow as separate compositions in no regular order. Some critics, as has already been stated, put the Republic first, while others start with the greater Alcibiades, and others again with the Theages; some begin with the Euthyphro, others with the Clitophon; some with the Timaeus, others with the Phaedrus; others again with the Theaetetus, while many begin with the Apology. The following dialogues are acknowledged to be spurious: the Midon or Horse-breeder
Plato has employed a variety of terms in order to make his system less intelligible to the ignorant. But in a special sense he considers wisdom to be the science of those things which are objects of thought and really existent, the science which, he says, is concerned with God and the soul as separate from the body. And especially by wisdom he means philosophy, which is a yearning for divine wisdom. And in a general sense all experience is also termed by him wisdom, e.g. when he calls a craftsman wise. And he applies the same terms with very different meanings. For instance, the word φαῦλος (slight, plain) is employed by him[*](As e.g. Theaet. 147 c οἷον ἐν τῇ τοῦ πηλοῦ ἐρωτήσει φαῦλόν που καὶ ἁπλοῦν εἰπεῖν ὅτι γῇ ὑγρῷ φυραθεῖσα πηλὸς ἂν εἴη, τὸ δʼ ὅτου ἐᾶν χαίρειν. Cf. Rep. 527 d οὐ πάνυ φαῦλον ἀλλὰ χαλεπὸν πιστεῦσαι.) in the sense of ἁπλοῦς (simple, honest), just as it is applied to Heracles in the Licymnius of Euripides in the following passage[*](Nauck, T.G.F.2, Eur. 473.):
Plain (φαῦλος), unaccomplished, staunch to do great deeds, unversed in talk, with all his store of wisdom curtailed to action.
But sometimes Plato uses this same word (φαῦλος) to mean what is bad, and at other times for what is small or petty. Again, he often uses different terms to express the same thing. For instance, he calls the Idea form (εἶδος), genus (γένος), archetype (παράδειγμα), principle (ἀρχή) and cause (αἴτιον). He also uses contrary expressions for the same thing. Thus he calls the sensible thing both existent and non-existent,