And has each of them a distinct function like the parts of the face;--the eye, for example, is not like the ear, and has not the same functions; and the other parts are none of them like one another, either in their functions, or in any other way? I want to know whether the comparison holds concerning the parts of virtue. Do they also differ from one another in themselves and in their functions? For that is clearly what the simile would imply. Yes, Socrates, you are right in supposing that they differ. Then, I said, no other part of virtue is like knowledge, or like justice, or like courage, or like temperance, or like holiness? No, he answered. Well then, I said, suppose that you and I enquire into their natures. And first, you would agree with me that justice is of the nature of a thing, would you not? That is my opinion: would it not be yours also? Mine also, he said. And suppose that some one were to ask us, saying, 'O Protagoras, and you, Socrates, what about this thing which you were calling justice, is it just or unjust?'--and I were to answer, just: would you vote with me or against me? With you, he said. Thereupon I should answer to him who asked me, that justice is of the nature of the just: would not you? Yes, he said. And suppose that he went on to say: 'Well now, is there also such a thing as holiness?'--we should answer, 'Yes,' if I am not mistaken? Yes, he said. Which you would also acknowledge to be a thing--should we not say so? He assented. 'And is this a sort of thing which is of the nature of the holy, or of the nature of the unholy?' I should be angry at his putting such a question, and should say, 'Peace, man; nothing can be holy if holiness is not holy.' What would you say? Would you not answer in the same way? Certainly, he said. And then after this suppose that he came and asked us, 'What were you saying just now? Perhaps I may not have heard you rightly, but you seemed to me to be saying that the parts of virtue were not the same as one another.' I should reply, 'You certainly heard that said, but not, as you imagine, by me; for I only asked the question; Protagoras gave the answer.' And suppose that he turned to you and said, 'Is this true, Protagoras? and do you maintain that one part of virtue is unlike another, and is this your position?'--how would you answer him? I could not help acknowledging the truth of what he said, Socrates.