Sextus Empiricus Pyrrhoniae Hypotyposes 1.34.237

[237] for it alone of the Medical systems appears to avoid rash treatment of things non-evident by arbitrary assertions as to their apprehensibility or non-apprehensibility, and following appearances derives from them what seems beneficial, in accordance with the practice of the Sceptics. For we stated above ¹ that the common life, in which the Sceptic also shares, is four-fold, one part depending on the directing force of Nature, another on the compulsion of the affections, another on the tradition of laws and customs, and another on the training of the arts.