STRANGER: In the second place, he was a merchant in the goods of the soul.
THEAETETUS: Certainly.
STRANGER: In the third place, he has turned out to be a retailer of the same sort of wares.
THEAETETUS: Yes; and in the fourth place, he himself manufactured the learned wares which he sold.
STRANGER: Quite right; I will try and remember the fifth myself. He belonged to the fighting class, and was further distinguished as a hero of debate, who professed the eristic art.
THEAETETUS: True.
STRANGER: The sixth point was doubtful, and yet we at last agreed that he was a purger of souls, who cleared away notions obstructive to knowledge.
THEAETETUS: Very true.
STRANGER: Do you not see that when the professor of any art has one name and many kinds of knowledge, there must be something wrong? The multiplicity of names which is applied to him shows that the common principle to which all these branches of knowledge are tending, is not understood.
THEAETETUS: I should imagine this to be the case.