Sextus Empiricus Pyrrhoniae Hypotyposes 3.32.281

[281] and employs those which are weighty and capable by their stringency of disposing of the Dogmatists' ailment, self-conceit, in cases where the mischief is due to a severe attack of rashness, while he employs the milder arguments in the case of those whose ailment of conceit is superficial and easy to cure, and whom it is possible to restore to health by milder methods of persuasion. Hence the adherent of Sceptic principles does not scruple to propound at one time arguments that are weighty in their persuasiveness, and at another time such as appear less impressive,—and he does so on purpose, as the latter are frequently sufficient to enable him to effect his object.