ethics and politics. But what has been less observed about Sokrates, though not less true, is, that along with this change of topics he introduced a complete revolution in method. He placed the negative in the front of his procedure; giving to it a point, an emphasis, a substantive value, which no one had done before. His peculiar gift was that of cross-examination, or the application of his Elenchus to discriminate pretended from real knowledge. He found men full of confident beliefs on these ethical and political topics — affirming with words which they had never troubled themselves to define — and persuaded that they required no farther teaching: yet at the same time unable to give clear or consistent answers to his questions, and shown by this convincing test to be destitute of real knowledge. Declaring this false persuasion of knowledge, or confident unreasoned belief, to be universal, he undertook, as the mission of his life, to expose it: and he proclaimed that until the mind was disabused thereof and made painfully conscious of ignorance, no affirmative reasoned truth could be presented with any chance of success.

Such are the peculiar features of the Sokratic dialogue, exemplified in the compositions here reviewed. I do not mean that Sokrates always talked so; but that such was the marked peculiarity which distinguished his talking from that of others. It is philosophy, or reasoned truth, approached in the most polemical manner; operative at first only to discredit the natural, unreasoned intellectual growths of the ordinary mind, and to generate a painful consciousness of ignorance. I say this here, and I shall often say it again throughout these volumes. It is absolutely indispensable to the understanding of the Platonic dialogues; one half of which must appear unmeaning, unless construed with reference to this separate function and value of negative dialectic. Whether readers may themselves agree in such estimation of negative dialectic, is another question: but they must keep it in mind as the governing sentiment of Plato during much of his life, and of Sokrates throughout the whole of life: as being moreover one main cause of that antipathy which Sokrates inspired to many respectable orthodox contemporaries. I have thought it right to take constant account of this orthodox sentiment among the ordinary public, as the perpetual drag-chain, even when its force is not absolutely repressive, upon free speculation.

Proceeding upon this general view, I have interpreted the numerous negative dialogues in Plato as being really negative and nothing beyond. I have not presumed, still less tried to divine, an ulterior Affirmative beyond what the text reveals — neither arcana cœlestia, like Proklus and Ficinus,3 nor any other arcanum of terrestrial character. While giving such an analysis of each dialogue as my space permitted and as will enable the reader to comprehend its general scope and peculiarities — I have studied each as it stands written, and have rarely ascribed to Plato any purpose exceeding what he himself intimates. Where I find difficulties forcibly dwelt upon without any solution, I imagine, not that he had a good solution kept back in his closet, but that he had failed in finding one: that he thought it useful, as a portion of the total process necessary for finding and authenticating reasoned truth, both to work out these unsolved difficulties for himself, and to force them impressively upon the attention of others.4