There is no power relation without the correlative constitution of a field of knowledge, nor any knowledge that does not presuppose and constitute at the same time power relations
Michel Foucault[John Boswell] introduction of the concept of "gay" (in the way he defines it) provides us both with a useful instrument of research and at the same time a better comprehension of how people actually conceive of themselves and their sexual behavior.
Michel FoucaultBut let there be no misunderstanding: it is not that a real man, the object of knowledge, philosophical reflection or technological intervention, has been substituted for the soul, the illusion of theologians. The man described for us, whom we are invited to free, is already in himself the effect of a subjection more profound than himself. A 'soul' inhabits him and brings him to existence, which is itself a factor in the mastery that power exercises over the body. The soul is the effect and instrument of a political anatomy; the soul is the prison of the body.
Michel Foucault