And he who is most skilful in preventing or escaping from a disease is best able to create one? True. And he is the best guard of a camp who is best able to steal a march upon the enemy? Certainly. Then he who is a good keeper of anything is also a good thief? That, I suppose, is to be inferred. Then if the just man is good at keeping money, he is good at stealing it. That is implied in the argument. Then after all the just man has turned out to be a thief. And this is a lesson which I suspect you must have learnt out of Homer; for he, speaking of Autolycus, the maternal grandfather of Odysseus, who is a favourite of his, affirms that He was excellent above all men in theft and perjury. And so, you and Homer and Simonides are agreed that justice is an art of theft; to be practised however 'for the good of friends and for the harm of enemies,'--that was what you were saying? No, certainly not that, though I do not now know what I did say; but I still stand by the latter words. Well, there is another question: By friends and enemies do we mean those who are so really, or only in seeming? Surely, he said, a man may be expected to love those whom he thinks good, and to hate those whom he thinks evil. Yes, but do not persons often err about good and evil: many who are not good seem to be so, and conversely? That is true. Then to them the good will be enemies and the evil will be their friends? True. And in that case they will be right in doing good to the evil and evil to the good? Clearly. But the good are just and would not do an injustice? True. Then according to your argument it is just to injure those who do no wrong? Nay, Socrates; the doctrine is immoral. Then I suppose that we ought to do good to the just and harm to the unjust? I like that better. But see the consequence:--Many a man who is ignorant of human nature has friends who are bad friends, and in that case he ought to do harm to them; and he has good enemies whom he ought to benefit; but, if so, we shall be saying the very opposite of that which we affirmed to be the meaning of Simonides. Very true, he said: and I think that we had better correct an error into which we seem to have fallen in the use of the words 'friend' and 'enemy.' What was the error, Polemarchus? I asked. We assumed that he is a friend who seems to be or who is thought good. And how is the error to be corrected? We should rather say that he is a friend who is, as well as seems, good; and that he who seems only, and is not good, only seems to be and is not a friend; and of an enemy the same may be said. You would argue that the good are our friends and the bad our enemies? Yes. And instead of saying simply as we did at first, that it is just to do good to our friends and harm to our enemies, we should further say: It is just to do good to our friends when they are good and harm to our enemies when they are evil? Yes, that appears to me to be the truth.