the high eloquence which I have last mentioned, is always the offspring of passion.
I'd like to connect this with my earlier comment on movies whose enthusiasm outstrips their ability. The quality of passion is a hard thing to pin down--St. Augustine argues that a preacher driven by true faith will outstrip the best educated orator, but at the same time, makes allowances that you can't expect that of everyone, even people who do have true faith. This arrangement also means this section is in immediate parallel with Blair's notion that oratorical skill is inherent and natural, and the real rhetoric was in our hearts all along. I'm pretty suspicious of this as a method of teaching rhetoric, but, at the same time, I can't deny that sometime someone actually does pull off "true of heart" oratorical skill. Nothing technically amazing, but delivered like a champ because they believed in their cause.
