Sextus Empiricus Pyrrhoniae Hypotyposes 3.6.37

[37] Now though it is, perhaps, possible to show by these arguments alone the inapprehensibility of the elements and of the Material Principles, yet in order that we may be able to refute the Dogmatists in a more comprehensive manner we shall dwell on this topic at appropriate length. And since the opinions about the elements are, as we have shown, numerous and well-nigh infinite, we will excuse ourselves— because of the character of our present treatise— from discussing each opinion in detail, but will make answer to them all implicitly. For since the elements, whatever view one takes of them, must be finally regarded either as corporeal or incorporeal, ¹ we think it enough to show that corporeal things are inapprehensible and incorporeal things inapprehensible; for thus it will be clear that the elements also are inapprehensible.