3 KudoZ points awarded for this answer. Comment: "What made this answer acceptable was pfui = disgusting, which I didn't know. I don't necessarily think that in a text like this, contemporary glosses like bah!, beurk!, goodness me, no! or similar really express the time and place adequately, so my preference is to treat it literally as 'disgusting devil!' Bosch is involved in some kind of defection to the baroque Spanish Church is what I surmise, and he has painted some kind of incriminating painting. The poem or poem fragment is an exponent of a religious and artistic polemic. Very many thanks for this, which was immensely helpful."