Chapter XVII. Against the School of Xenophanes and Parmenides, Who Rejected the Senses. From the Eighth Book of Aristocles On Philosophy

[ARISTOCLES] [1]’BUT there came others uttering language opposed to these. For they think we ought to put down the senses and their presentations, and trust only to reason. For such were formerly the statements of Xenophanes and Parmenides and Zenon and Melissus, and afterwards of Stilpo and the Megarics. Whence these maintain that “being” is one, and that the “other” does not exist, and that nothing is generated, and nothing perishes, nor is moved at all.

‘The fuller argument then against these we shall learn in our course of philosophy; at present, however, we must say as much as this. We should argue, that though reason is the most divine of our faculties, yet nevertheless we have need also of sense, just as we have of the body. And it is evidently the nature of sense also to be true: for it is not possible that the sentient subject should not be in some way affected, and being affected he must know the affection: therefore sensation also is a kind of knowledge.

‘Moreover if sensation is a kind of affection, and everything that is affected is affected by something, that which acts must certainly be other than that which is acted on. So that first there would be the so-called “other,” as for instance, the colour and the sound; and then the existing thing will not be one: nor moreover will it be motionless, for sensation is a motion.

‘And in this way every one wishes to have his senses in a natural state, inasmuch as he trusts, I suppose, to sound senses rather than to diseased. With good reason therefore a strong love of our senses is infused in us. No one certainly, unless mad, would choose ever to lose a single sense, that so he might gain all other good things.

‘Those then who found fault with the senses, if at least they were persualded that it was useless to have them, ought to have said just what Pandarus says in Homer about his own bow,

“Then may a stranger’s sword cut off my head, If with these hands I shatter not and burn The bow that thus hath failed me at my need,” [2]

and immediately after to have destroyed all their senses: for thus one would have believed them as teaching by deed that they had no need of them.

‘But now this is the very greatest absurdity; for though in their words they declare their senses to be useless, in their deeds they continue to make the fullest use of them.

‘Melissus in fact wishing to show why none of these things which are apparent and visible really exists, demonstrates it by the phenomena themselves. He says in fact: “For if earth exists, and water, and air, and fire, and iron, and gold, and the living and the dead, and black and white, and all the other things which men say are real, and if we see and hear rightly, then ‘being’ also ought to be such as it at first seemed to us to be, and not to change, nor become other, but each, thing ought always to be just such as it is. But now we say that we see, and hear, and understand aright: yet it seems to us that the hot becomes cold, and the cold hot, and the hard soft, and the soft hard.”

‘But when he used to say these and many other such things one might very reasonably have asked him, Well then, was it not by sensation you learned that what is hot now becomes cold afterwards? And in like manner concerning the other instances. For just as I said, it would be found that he abolishes and convicts the senses because he most fully believes them.

‘But in fact the arguments of this kind have already been subjected to nearly sufficient correction: they have certainly become obsolete, as if they had never been uttered at all. Now indeed we may say boldly that those philosophers take the right course who adopt both the senses and the reason for acquiring the knowledge of things.’

Such then were the followers of Xenophanes, who is said to have flourished at the same time with Pythagoras and Anaxagoras. Now a hearer of Xenophanes was Parmenides, and of Parmenides Melissus, of him Zeno, of him Leucippus, of him Democritus, of him Protagoras and Nessas, and of Nessas Metrodorus, of him Diogenes, of him Anaxarchus, and a disciple of Anaxarchus was Pyrrho, from whom arose the school of those who were surnamed Sceptics. And as these also laid it down that no conception of anything was possible either by sense or by reason, but suspended their judgement in all cases, we may learn how they were refuted by those who held an opposite opinion, from the book before mentioned, speaking word for word as follows: [3]