Sextus Empiricus Pyrrhoniae Hypotyposes 1.14.93

[93] So too with spurge: ¹ since it pains the eyes but causes no pain to any other part of the body, we cannot say whether, in its real nature, it is absolutely painful or painless to bodies. Rain-water, too, is beneficial to the eyes but roughens the wind-pipe and the lungs; as also does olive-oil, though it mollifies the epidermis. The cramp-fish, also, when applied to the extremities produces cramp, but it can be applied to the rest of the body without hurt. Consequently we are unable to say what is the real nature of each of these things, although it is possible to say what each thing at the moment appears to be.