coffee break thoughts:
The difference between poetry and rhetoric : poetry stems from an elusive necessity, which is inherent to, and resolves itself within, the articulation of the poem itself. But that's not all : the poem's language displays the effects of this necessity with a kind of self-reflexive awareness.
Rhetoric applies language toward particular persuasive purposes. The language itself is of value only insofar as it advances those persuasions. This is a form of necessity external to the work of art.
Many well-meaning poets are writing rhetorical texts, unaware that their golden speech contains no inner necessity.