help with a quote

Can any one help me urgently with a quote?
Foucault is talking about his interpretation of Nietzsche (I think it's
Nietzsche) and he says that he kind of distorts the ideas of those he is
interpreting to make them "groan in protest" or something like that.
Does anyone know the full quote or where I can can find it?
Sorry I can't be more exact.
Cheers,
SAUL

Partial thread listing: