Physiology#
Summary#
Nietzsche argues for studying physiology with a clear conscience by insisting that sense-organs are not mere phenomena in the idealistic philosophical sense, for as such they could not be causes. He critiques the idealist position that the external world is the work of our organs as leading to an absurd regress where organs would be the work of organs, a reductio ad absurdum equivalent to the fundamentally absurd concept of causa sui.