Wendell Berry poem, Practice Resurrection
Peterson, a pastor who cares about words and loves poetry, has cited this Wendell Berry poem in the past. So have Brian Walsh & Sylvia Keesmaat (in Colossians Remixed: Subverting the Empire.)
The poem is actually called Manifesto: The Mad Farmer Liberation Front and was published in the early 70's in The Country of Marriage. It is now available in The Selected Poems of Wendell Berry.
Read the poem here.