for we are inquiring not in order to know what virtue is, but in order to become good, since otherwise our inquiry would have been of no use
The poet, being an imitator like a painter or any other artist, must of necessity imitate one of three objects - things as they were or are, things as they are said or thought to be, or things as they ought to be. The vehicle of expression is language - either current terms or, it may be, rare words or metaphors.
Men agree that justice in the abstract is proportion, but they differ in that some think that if they are equal in any respect they are equal absolutely, others that if they are unequal in any respect they should be unequal in all. The only stable principle of government is equality according to proportion, and for every man to enjoy his own.