The purpose of poetry?

Purpose and poetry
Oil and water verily

Like purpose and frolic
A sorry pair atonic

Incapable of joining
Vast chasm yawning

Seeking purpose in poetry
A runaway train in zealotry

In a past century more bucolic
Medicine men three moronic

In vain purpose in poetry a-seeking
Set to John Clare‘s brain a-probing

Why seek purpose in poetry?
The paradoxical should stay free

Poetry makes purposeful hearts dyspeptic
In confusion? In thrall? In panic?

Poetry simply nourishes our feeling
As food nourishes our being

What is the purpose of poetry?