The document tells the story of the famous poet Su Dongpo and his interaction with Chan master Foyin regarding a poem he wrote to demonstrate his Buddhist practice. After Foyin humorously critiqued the poem with the word 'fart', Su Dongpo, feeling insulted, crossed the river to confront him, only to be enlightened by Foyin's comment about the irony of his situation. Ultimately, Su Dongpo had a realization about maintaining composure in the face of worldly challenges, exemplified by the metaphor of 'the eight winds'.