This view is universally accepted,
although in my opinion rhetoric draws largely on the
two other kinds of art. For it may on occasion be
content with the mere examination of a thing.
Rhetoric is still in the orator's possession even though
he be silent, while if he gives up pleading either
designedly or owing to circumstances over which he
has no control, he does not therefore cease to be an
orator, any more than a doctor ceases to be a doctor
when he withdraws from practice.