Usually, the means of production et cetera are denied, concealed or hidden. The role-performance of the occupation 'poet' makes them appear 'unnatural' and therefore incongruous. The difference between a poet writing a poem and a poet having a lyrical impulse is the difference between Van Gogh working on a painting and Kirk Douglas cutting his ear off. The poet who believes in Poetry as the Expression of Emotion addresses two kind of readers, the Professional and the Common. You can't feel things intensely any more.
Epigraphs can proclaim an alliance, revive a disagreement, or give away a secret.
They can lend the tang of irony, or permeate a book with the flavour of alien philosophies or ancient beliefs. They also suggest a poetics. Wallace Stevens 'Money is a kind of poetry. His stepfather straightened his aching back. The blond-haired kid clambered out of the driver's seat and faced the camera.