Then the wise man may indeed know that the physician has some kind of science
or knowledge; but when he wants to discover the nature of this he will ask,
What is the subject-matter? For the several sciences are distinguished not by
the mere fact that they are sciences, but by the nature of their subjects. Is
not that true?
Quite true.
And medicine is distinguished from other sciences as having the subject-matter
of health and disease?
Yes.
And he who would enquire into the nature of medicine must pursue the enquiry
into health and disease, and not into what is extraneous?
True.
And he who judges rightly will judge of the physician as a physician in what
relates to these?
He will.
He will consider whether what he says is true, and whether what he does is
right, in relation to health and disease?
He will.
But can any one attain the knowledge of either unless he have a of medicine?
He cannot.
No one at all, it would seem, except the physician can have this knowledge;
and therefore not the wise man; he would have to be a physician as well as a
wise man.