" It is not only through their complexity that the immune systems confuse their owners' longing for security; they cause even more perplexity through their immanent paradox, as their successes, if they become too thorough, are perverted to become their own kind of reasons for illness: the growing universe of auto-immune pathologies illustrates the dangerous tendency of the own to win itself to death in the battle against the other.
It is no coincidence that recent interpretations of the immunity phenomenon exhibit a tendency to assign far greater significance to the presence of the foreign amidst the own than was intended in traditional identitary understandings of a monolithically closed organismic self - one could almost speak of a post-structuralist turn in biology. In the light of this, the patrol of antibodies in an organism seems less like a police force applying a rigid immigration policy than a theater troupe parodying its invaders and performing as their transvestites. "

― Peter Sloterdijk , Foams: Spheres Volume III: Plural Spherology