Sextus Empiricus Pyrrhoniae Hypotyposes 1.31.215

[215] Some assert that the Cyrenaic ¹ doctrine is identical with Scepticism since it too affirms that only mental states are apprehended. But it differs from Scepticism inasmuch as it says that the End is pleasure and the smooth motion of the flesh, whereas we say it is ‟quietude,” which is the opposite of their End; for whether pleasure be present or not present the man who positively affirms pleasure to be the End undergoes perturbations, as I have argued in my chapter ‟Of the End.” ² Further, whereas we suspend judgement, so far as regards the essence of external objects, the Cyrenaics declare that those objects possess a real nature which is inapprehensible.