In Socrates' discussion of injustice, we find a number of familiar themes: that there are experts in ethical matters and that one should not take just anyone's opinion as though it were of equal value, and that no one ever knowingly or willingly does wrong. However, at the same time, his equation of doing injury with injustice is again questionable. (Elsewhere, in the Gorgias, it is argued that an injury done to a wrongdoer in punishment is for the good of the wrongdoer.) Here, Socrates seems to be firm in his opinion that no injurious action can be just.

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