Book 1 — 83.
J. M. (John McFarland) Kennedy translation
Poor Humanity!—A single drop of blood too much or too little in the brain may render our life unspeakably miserable and difficult, and we may suffer more from this single drop of blood than Prometheus from his vulture. But the worst is when we do not know that this drop is causing our sufferings—and we think it is “the devil!” Or “sin!”