“ The impossibility of knowledge, even in regard to our own ignorance or doubt, should induce the wise man to withdraw into himself, avoiding the stress and emotion which belong to the contest of vain imaginings. This drastic scepticism is the first and the most thorough exposition of agnosticism in the history of thought. Its ethical results may be compared with the ideal tranquillity of the Stoics and the Epicureans. (For its relation to the New Academy and to scepticism in general see Scepticism and Megarian School of Philosophy.) ”

“ The same idea is expressed also by the terms eippexkia' (equilibrium) and dqbarria. (refusal to speak, non-committal silence) . Thirdly, these results are applied to life in general. Pyrrho concludes that, since nothing can be known, the only proper attitude is imperturbability (ataraxia) . ”