Socrates’s discussion of purity in the Sophist treats the concept in a refined fashion. He admits the existence of bodily impurities, but his focus is on the mental impurities that need to be cleansed if someone is to escape the evils of ignorance and error. Benjamin Jowett provides this summary of Plato’s taxonomy of purity in his edition of the dialogue: “Do not our household servants talk of sifting, straining, winnowing? And they also speak of carding, spinning, and the like.... Read more