Socrates. Enough. Now, O Ion, would a physician or a charioteer be the better judge as to Homer’s sagacity on this subject?
Ion. Of course, a charioteer.
Socrates. Because he understands the art—or from what other reason?
Ion. From his knowledge of the art.
Socrates. For one science is not gifted with the power of judging of another—a steersman, for instance, does not understand medicine?
Ion. Without doubt.
Socrates. Nor a physician, architecture?
Ion. Of course not.
Socrates. Is it not thus with every art? If we are adepts in one, we are ignorant of another. But first, tell me, do not all arts differ one from the other?
Ion. They do.