Greek φυσιολογία (physiologia)
1. Key Texts
Quote from Epicurus, Principal Doctrine 11Were we not upset by the worries that celestial phenomena and death might matter to us, and also by failure to appreciate the limits of pains and desires, we would have no need for natural philosophy. (tr. Long & Sedley)
Quote from Epicurus, Principal Doctrine 12There is no way to dispel the fear about matters of supreme importance, for someone who does not know what the nature of the universe is but retains some of the fears based on mythology. Hence without natural philosophy there is no way of securing the purity of our pleasures. (tr. Long & Sedley)