CALLICLES: Yes.
SOCRATES: And if they are opposed to each other, then, like health and disease, they exclude one another; a man cannot have them both, or be without them both, at the same time?
CALLICLES: What do you mean?
SOCRATES: Take the case of any bodily affection:—a man may have the complaint in his eyes which is called ophthalmia?
CALLICLES: To be sure.
SOCRATES: But he surely cannot have the same eyes well and sound at the same time?
CALLICLES: Certainly not.
SOCRATES: And when he has got rid of his ophthalmia, has he got rid of the health of his eyes too? Is the final result, that he gets rid of them both together?
CALLICLES: Certainly not.
SOCRATES: That would surely be marvellous and absurd?