Sextus Empiricus Pyrrhoniae Hypotyposes 3.7.51

[51] Also, he who asserts that he apprehends the Incorporeal will maintain that he apprehends it either by sense or by means of reason. Certainly not by sense, since it is supposed that the senses perceive the sensibles by way of ‟impression” and ‟indentation,” —take sight, for instance, whether it occur by reason of the tension of a cone, or of the emissions and immissions of images, or by effusions of rays or colours; ¹ and hearing too, whether it be the smitten air ² or the parts of the sound that are carried round the ears and smite the acoustic breath so as to effect the perception of sound. Smells also impinge on the nose and flavours on the tongue, and likewise objects of touch on the sense of touch.