To the doctrine that virtue is knowledge, Plato has been constantly tending in the previous Dialogues. But the new truth is no sooner found than it vanishes away. 'If there is knowledge, there must be teachers; and where are the teachers?' There is no knowledge in the higher sense of systematic, connected, reasoned knowledge, such as may one day be attained, and such as Plato himself seems to see in some far off vision of a single science. And there are no teachers in the higher sense of the word; that is to say, no real teachers who will arouse the spirit of enquiry in their pupils, and not merely instruct them in rhetoric or impart to them ready-made information for a fee of 'one' or of 'fifty drachms.' Plato is desirous of deepening the notion of education, and therefore he asserts the paradox that there are no educators. This paradox, though different in form, is not really different from the remark which is often made in modern times by those who would depreciate either the methods of education commonly employed, or the standard attained--that 'there is no true education among us.' There remains still a possibility which must not be overlooked. Even if there be no true knowledge, as is proved by 'the wretched state of education,' there may be right opinion, which is a sort of guessing or divination resting on no knowledge of causes, and incommunicable to others. This is the gift which our statesmen have, as is proved by the circumstance that they are unable to impart their knowledge to their sons. Those who are possessed of it cannot be said to be men of science or philosophers, but they are inspired and divine. There may be some trace of irony in this curious passage, which forms the concluding portion of the Dialogue. But Plato certainly does not mean to intimate that the supernatural or divine is the true basis of human life. To him knowledge, if only attainable in this world, is of all things the most divine. Yet, like other philosophers, he is willing to admit that 'probability is the guide of life (Butler's Analogy.);' and he is at the same time desirous of contrasting the wisdom which governs the world with a higher wisdom. There are many instincts, judgments, and anticipations of the human mind which cannot be reduced to rule, and of which the grounds cannot always be given in words. A person may have some skill or latent experience which he is able to use himself and is yet unable to teach others, because he has no principles, and is incapable of collecting or arranging his ideas. He has practice, but not theory; art, but not science. This is a true fact of psychology, which is recognized by Plato in this passage. But he is far from saying, as some have imagined, that inspiration or divine grace is to be regarded as higher than knowledge. He would not have preferred the poet or man of action to the philosopher, or the virtue of custom to the virtue based upon ideas.