I've been giving a lot of thought to the quasi-epistemological function of archaic mythology, to the extent that myth-tales concretize societal beliefs about the knowledge possible through myth-stories: the way shamans contact the dead, the number of planets in the heavens, and so on.

Recently came across this extended quote applying the idea of epistemology to poetry as well, with reference to T.S. Eliot's reading of the British idealist F. H. Bradley:

Eliot illustrates his explanation of poetic epistemology by saying that John Donne did not simply feel his feelings and think his thoughts; he felt his thoughts and thought his feelings. He was able to "feel his thought as immediately as the odour of a rose." Immediately" in this famous simile is a technical term in philosophy, used with precision; it means unmediated through mind, unshattered into subject and object.
Can myth and poetry be non-rational epistemologies, yea or nay?