protagoras   

husbandman or the physician; for the good may become bad, as another

poet witnesses:



The good are sometimes good and sometimes bad.



But the bad does not become bad; he is always bad. So that when the

force of circumstances overpowers the man of resources and skill and

virtue, then he cannot help being bad. And you, Pittacus, are

saying, "Hard is it to be good." Now there is a difficulty in becoming

good; and yet this is possible: but to be good is an impossibility-



For he who does well is the good man, and he who does ill is the

bad.



But what sort of doing is good in letters? and what sort of doing

makes a man good in letters? Clearly the knowing of them. And what

sort of well-doing makes a man a good physician? Clearly the knowledge

of the art of healing the sick. "But he who does ill is the bad."

Now who becomes a bad physician? Clearly he who is in the first

place a physician, and in the second place a good physician; for he

may become a bad one also: but none of us unskilled individuals can by

any amount of doing ill become physicians, any more than we can become

carpenters or anything of that sort; and he who by doing ill cannot

become a physician at all, clearly cannot become a bad physician. In

like manner the good may become deteriorated by time, or toil, or

disease, or other accident (the only real doing ill is to be

deprived of knowledge), but the bad man will never become bad, for

he is always bad; and if he were to become bad, he must previously

have been good. Thus the words of the poem tend to show that on the

one hand a man cannot be continuously good, but that he may become

good and may also become bad; and again that