[135c]
since he denies that the idea of each thing is always the same, and in this way he will utterly destroy the power of carrying on discussion. You seem to have been well aware of this.”
“Quite true,” he said.
“Then what will become of philosophy? To what can you turn, if these things are unknown?”
“I do not see at all, at least not at present.”
“No, Socrates,” he said, “for you try too soon, before you are properly trained, to define the beautiful, the just, the good, and all the other ideas.
