XXV. However, let us say no more about this. Undoubtedly, when opinion and perception are put an end to, the retention of every kind of assent must follow; as, if I prove that nothing can be perceived, you would then grant that a philosopher would never assent to anything. What is there then that can be perceived, if even the senses do not warn us of the truth? But you, O Lucullus, defend them by a common topic; and to prevent you from being able to do so it was, that I yesterday, when it was not otherwise necessary, said so [pg 060] much against the senses. But you say that you are not at all moved by “the broken oar” or “the dove's neck.” In the first place, I will ask why?—for in the case of the oar, I feel that that which appears to be the case, is not really so; and that in the dove's neck there appear to be many colours, but are not in reality more than one. Have we, then, said nothing more than this? Let all our arguments stand: that man is tearing his cause to pieces; he says that his senses are voracious. Therefore you have always one backer who will plead the cause at his own risk: for Epicurus brings the matter down to this point, that if once in a man's life one of his senses has decided wrongly, none of them is ever to be trusted. This is what he calls being true, and confiding in his own witnesses, and urging his proofs to their just conclusion; therefore Timagoras the Epicurean declares, that when he had twisted his eye with his hand, he had never seen two flames appear out of one candle: for that the error was one of opinion, and not one of his eyes; just as if the question were what the fact is, and not what it appears to be. However, he is just like his predecessors. But as for you, who say that of the things perceived by your senses, some are true and some false, how do you distinguish between them? Cease, I beg of you, to employ common topics: we have plenty of them at home.
If any god were to ask you, while your senses are sound and unimpaired, whether you desire anything further, what would you answer? I wish, indeed, he would ask me! You should hear how ill he treats us: for how far are we to look in order to see the truth? I can see the Cumæan villa of Catulus from this place, but not his villa near Pompeii; not that there is any obstacle interposed, but my eyesight cannot extend so far. What a superb view! We see Puteoli, but we do not see our friend Avianus, though he may perhaps be walking in the portico of Neptune; there was, however, some one or other who is often spoken of in the Schools who could see things that were a thousand and eighty furlongs off; and some birds can see further still. I should therefore answer your god boldly, that I am not at all contented with these eyes of mine. He will tell me, perhaps, that I can see better than some fishes; which are not seen by us, and which even now are beneath our eyes, and yet they cannot look up far [pg 061] enough to see us: therefore, as water is shed around them, so a dense air is around us. But we desire nothing better. What? do you suppose that a mole longs for light?—nor would he complain to the god that he could not see far, but rather that he saw incorrectly. Do you see that ship? It appears to us to be standing still; but to those who are in that ship, this villa appears to be moving. Seek for the reason why it seems so, and if you discover it ever so much, and I do not know whether you may not be able to, still you will have proved, not that you have a trustworthy witness, but that he has not given false evidence without sufficient reason.
XXVI. What need had I to speak of the ship? for I saw that what I said about the oar was despised by you; perhaps you expect something more serious. What can be greater than the sun, which the mathematicians affirm to be more than eighteen times as large as the earth? How little does it appear to us! To me, indeed, it seems about a foot in diameter; but Epicurus thinks it possible that it may be even less than it seems, but not much; nor does he think that it is much greater, but that it is very near the size it seems to be: so that our eyes are either quite correct, or, at all events, not very incorrect. What becomes then of the exception, “If once...?” However, let us leave this credulous man, who does not believe that the senses are ever wrong,—not even now, when that sun, which is borne along with such rapidity that it is impossible even to conceive how great its velocity is, nevertheless seems to us to be standing still.
However, to abridge the controversy, consider, I pray you, within what narrow bounds you are confined. There are four principles which conduct you to the conclusion that there is nothing which can be known, or perceived, or comprehended;—and it is about this that the whole dispute is. The first principle is, that some perceptions are false; the second, that such cannot be perceived; the third, that of perceptions between which there is no difference, it is not possible that some of them can be perceived and that others cannot; the fourth, that there is no true perception proceeding from the senses, to which there is not some other perception opposed which in no respect differs from it, and which cannot be perceived. Now of these four principles, the second and third are admitted by every one. Epicurus does not admit the [pg 062] first, but you, with whom we are now arguing, admit that one too,—the whole contest is about the fourth.
The man, then, who saw Publius Servilius Geminus, if he thought that he saw Quintus, fell into a perception of that kind that could not be perceived; because what was true was distinguished by no characteristic mark from what was false: and if this distinctive mark were taken away, what characteristic of the same kind could he have by which to recognise Caius Cotta, who was twice consul with Geminus, which could not possibly be false? You say that such a likeness as that is not in the nature of things. You fight the question vigorously, but you are fighting a peaceably disposed adversary. Grant, then, that it is not; at all events, it is possible that it should seem to be so; therefore it will deceive the senses. And if one likeness deceives them, it will have made everything doubtful; for when that judgment is once taken away by which alone things can be known, then, even if the person whom you see, be really the person whom he appears to you to be, still you will not judge by that characteristic which you say you ought, being of such a character that one of the same kind cannot be false. If, therefore, it is possible that Publius Geminus may appear to you to be Quintus, what certainty have you that he may not appear to you to be Cotta though he is not, since some things do appear to you to be what they are not? You say that everything has its own peculiar genus; that there is nothing the same as something else. That is a stoic doctrine, and one not very credible, for they say that there is not a single hair or a single grain in every respect like another hair or grain. These things could all be refuted, but I do not wish to be contentious; for it has nothing in the world to do with the question whether the things which are seen do not differ at all in any part, or whether they cannot be distinguished from another even though they do differ. But, granting that there cannot be such a likeness between men, can there not be such between statues? Tell me, could not Lysippus, using the same brass, the same composition of metals, the same atmosphere, water, and all other appliances, have made a hundred Alexanders exactly alike? How then could you distinguish between them? Again; if I, with this ring, make a hundred impressions on the same piece of wax, is it possible that there [pg 063] should be any difference to enable you to distinguish one from the other?—or, shall you have to seek out some ring engraver, since you have already found us a Delian poulterer who could recognise his eggs?
XXVII. But you have recourse to art, which you call in to the aid of the senses. A painter sees what we do not see; and as soon as a flute-player plays a note the air is recognised by a musician. Well? Does not this argument seem to tell against you, if, without great skill, such as very few persons of our class attain to, we can neither see nor hear? Then you give an excellent description of the skill with which nature has manufactured our senses, and intellect, and the whole construction of man, in order to prevent my being alarmed at rashness of opinions. Can you also, Lucullus, affirm that there is any power united with wisdom and prudence which has made, or, to use your own expression, manufactured man? What sort of a manufacture is that? Where is it exercised? when? why? how? These points are all handled ingeniously, they are discussed even elegantly. Let it be said even that they appear likely; only let them not be affirmed positively. But we will discuss natural philosophy hereafter, and, indeed, we will do so that you, who said a little while ago that I should speak of it, may appear not to have spoken falsely.
However, to come to what is clearer, I shall now bring forward general facts on which whole volumes have been filled, not only by those of our own School, but also by Chrysippus. But the Stoics complain of him, that, while he studiously collected every argument which could be brought forward against the senses and clearness, and against all custom, and against reason, when he came to reply to himself, he was inferior to what he had been at first; and therefore that, in fact, he put arms into the hands of Carneades. Those arguments are such as have been ingeniously handled by you. You said that the perceptions of men asleep, or drunk, or mad, were less vigorous than those of men awake, sober, and sane. How do you prove that? because, when Ennius had awakened, he would not say that he had seen Homer, but only that Homer had seemed to be present. And Alcmæon says—
My heart distrusts the witness of my eyes.
And one may say the same of men who are drunk. As if any one denied that when a man has awakened he ceases to think his dreams true; and that a man whose frenzy has passed away, no longer conceives those things to be real which appeared so to him during his madness. But that is not the question: the question is, how those things appear to us, at the time when they do appear. Unless, indeed, we suppose that Ennius heard the whole of that address—
O piety of the soul....