The body—and everything that touches it: diet, climate, and soil—is the domain of the Herkunft [origin. lineage. descent]. The body manifests the stigmata of past experience and also gives rise to desires, failings, and errors. These elements may join in a body where they achieve a sudden expression, but as often, their encounter is an engagement in which they efface each other, where the body becomes the pretext of their insurmountable conflict.
The body is the inscribed surface of events (traced by language and dissolved by ideas), the locus of a dissociated Self (adopting the illusion of a substantial unity), and a volume in perpetual disintegration. Genealogy, as an analysis of descent, is thus situated within the articulation of the body and history. Its task is to expose a body totally imprinted by history and the process of history’s destruction of the body.
Michel Foucault ~ Nietzsche, Genealogy, History