[25] Stallbaum, Prolegom. pp. 52-286-332.
[26] According to Stallbaum (Prolegg. pp. 277-337) the Parmenidês is the only dialogue in which Plato has discussed, with philosophical exactness, the theory of Ideas; in all the other dialogues he handles it in a popular and superficial manner. There is truth in this — indeed more truth (I think) than Stallbaum himself supposed: otherwise he would hardly have said that the objections in the Parmenides could easily have been answered, if Plato had chosen.
Stallbaum tells us, not only respecting Socher but respecting Schleiermacher (pp. 324-332), “Parmenidem omnino non intellexit”. In my judgment, Socher understands the dialogue better than Stallbaum, when he (Socher) says, that the objections in the first half bear against the genuine Platonic Ideas; though I do not agree with his inference about the spuriousness of the dialogue.
Views of Stallbaum and Socher. The latter maintains that Plato would never make such objections against his own theory, and denies the authenticity of the Parmenidês.
Socher has so much difficulty in conceiving that Plato can have advanced such forcible objections against a doctrine, which nevertheless in other Platonic dialogues is proclaimed as true and important, — that he declares the Parmenidês (together with the Sophistês and Politikus) not to be genuine, but to have been composed by some unknown Megaric contemporary. To pass over the improbability that any unknown author should have been capable of composing works of so much ability as these — Socher’s decision about spuriousness is founded upon an estimate of Plato’s philosophical character, which I think incorrect. Socher expects (or at least reasons as if he expected) to find in Plato a preconceived system and a scheme of conclusions to which every thing is made subservient.
Philosophers are usually advocates, each of a positive system of his own.
In most philosophers, doubtless, this is what we do find. Each starts with some favourite conclusions, which he believes to be true, and which he supports by all the arguments in their favour, as far as his power goes. If he mentions the arguments against them, he usually answers the weak, slurs over or sneers at the strong: at any rate, he takes every precaution that these counter arguments shall appear unimportant in the eyes of his readers. His purpose is, like that of a speaker in the public assembly, to obtain assent and belief: whether the hearers understand the question or not, is a matter of comparative indifference: at any rate, they must be induced to embrace his conclusion. Unless he thus foregoes the character of an impartial judge, to take up that of an earnest advocate; unless he bends the whole force of his mind to the establishment of the given conclusion — he becomes suspected as deficient in faith or sincerity, and loses much in persuasive power. For an earnest belief, expressed with eloquence and feeling, is commonly more persuasive than any logic.
Different spirit of Plato in his Dialogues of Search.
Now whether this exclusive devotion to the affirmative side of certain questions be the true spirit of philosophy or not, it is certainly not the spirit of Plato in his Dialogues of Search; wherein he conceives the work of philosophy in a totally different manner. He does not begin by stating, even to himself a certain conclusion at which he has arrived, and then proceed to prove that conclusion to others. The search or debate (as I have observed in a preceding [chapter]) has greater importance in his eyes than the conclusion: nay, in a large proportion of his dialogues, there is no conclusion at all: we see something disproved, but nothing proved. The negative element has with him a value and importance of its own, apart from the affirmative. He is anxious to set forth what can be said against a given conclusion; even though not prepared to establish any thing in its place.
The Parmenidês is the extreme manifestation of the negative element. That Plato should employ one dialogue in setting forth the negative case against the Theory of Ideas is not unnatural.