hearer?"

"Yes."

"And are all profited by what they hear, or only some among them? So
that it seems there is an art of hearing as well as of speaking. . . .
To make a statue needs skill: to view a statue aright needs skill also."

"Admitted."

"And I think all will allow that one who proposes to hear philosophers
speak needs a considerable training in hearing. Is that not so? The tell
me on what subject your are able to hear me."

"Why, on good and evil."

"The good and evil of what? a horse, an ox?"

"No; of a man."

"Do we know then what Man is? what his nature is? what is the idea we
have of him? And are our ears practised in any degree on the subject?
Nay, do you understand what Nature is? can you follow me in any degree
when I say that I shall have to use demonstration? Do you understand
what Demonstration is? what True or False is? . . . must I drive you to
Philosophy? . . . Show me what good I am to do by discoursing with you.
Rouse my desire to do so. The sight of a pasture it loves stirs in
a sheep the desire to feed: show it a stone or a bit of bread and it
remains unmoved. Thus we also have certain natural desires, aye, and one
that moves us to speak when we find a listener that is worth his salt: