Vitae philosophorum

Diogenes Laertius

Diogenes Laertius. Hicks, R. D., editor. Cambridge, MA.: Harvard University Press; London: William Heinemann Ltd., 1925.

There is nothing good or bad by nature, for if there is anything good or bad by nature, it must be good or bad for all persons alike, just as snow is cold to all. But there is no good or bad which is such to all persons in common; therefore there is no such thing as good or bad by nature. For either all that is thought good by anyone whatever must be called good, or not all. Certainly all cannot be so called; since one and the same thing is thought good by one person and bad by another; for instance, Epicurus thought pleasure good and Antisthenes thought it bad; thus on our supposition it will follow that the same thing is both good and bad. But if we say that not all that anyone thinks good is good, we shall have to judge the different opinions; and this is impossible because of the equal validity of opposing arguments. Therefore the good by nature is unknowable.

The whole of their mode of inference can be gathered from their extant treatises. Pyrrho himself, indeed, left no writings, but his associates Timon, Aenesidemus, Numenius and Nausiphanes did; and others as well.

The dogmatists answer them by declaring that the Sceptics themselves do apprehend and dogmatize; for when they are thought to be refuting their hardest they do apprehend, for at the very same time they are asseverating and dogmatizing. Thus even when they declare that they determine nothing, and that to every argument there is an opposite argument, they are actually determining these very points and dogmatizing.

The others reply, We

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confess to human weaknesses; for we recognize that it is day and that we are alive, and many other apparent facts in life; but with regard to the things about which our opponents argue so positively, claiming to have definitely apprehended them, we suspend our judgement because they are not certain, and confine knowledge to our impressions.[*](i.e. all we know is that we feel. Cf. supra, ii.§ 92.) For we admit that we see, and we recognize that we think this or that, but how we see or how we think we know not. And we say in conversation that a certain thing appears white, but we are not positive that it really is white. As to our We determine nothing and the like,[*](§ 74.) we use the expressions in an undogmatic sense,

for they are not like the assertion that the world is spherical. Indeed the latter statement is not certain, but the others are mere admissions. Thus in saying We determine nothing, we are not determining even that.

Again, the dogmatic philosophers maintain that the Sceptics do away with life itself, in that they reject all that life consists in. The others say this is false, for they do not deny that we see; they only say that they do not know how we see. We admit the apparent fact, say they, without admitting that it really is what it appears to be. We also perceive that fire burns; as to whether it is its nature to burn, we suspend our judgement.

We see that a man moves, and that he perishes; how it happens we do not know. We merely object to accepting the unknown substance behind phenomena. When we say a picture has projections, we are describing what is apparent; but if we say that it has no projections, we are then speaking, not of what is apparent, but of something else. This is

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what makes Timon say in his Python that he has not gone outside what is customary. And again in the Conceits he says[*](Fr. 69 D.):
But the apparent is omnipotent wherever it goes;
and in his work On the Senses, I do not lay it down that honey is sweet, but I admit that it appears to be so.

Aenesidemus too in the first book of his Pyrrhonean Discourses says that Pyrrho determines nothing dogmatically, because of the possibility of contradiction, but guides himself by apparent facts. Aenesidemus says the same in his works Against Wisdom and On Inquiry. Furthermore Zeuxis, the friend of Aenesidemus, in his work On Two-sided Arguments, Antiochus of Laodicea, and Apellas in his Agrippa all hold to phenomena alone. Therefore the apparent is the Sceptic’s criterion, as indeed Aenesidemus says; and so does Epicurus. Democritus, however, denied that any apparent fact could be a criterion, indeed he denied the very existence of the apparent.

Against this criterion of appearances the dogmatic philosophers urge that, when the same appearances produce in us different impressions, e.g. a round or square tower, the Sceptic, unless he gives the preference to one or other, will be unable to take any course; if on the other hand, say they, he follows either view, he is then no longer allowing equal value to all apparent facts. The Sceptics reply that, when different impressions are produced, they must both be said to appear[*](i.e. the one has as much right to be called an appearance as the other.); for things which are apparent are so called because they appear. The end to be realized they hold to be suspension of judgement, which brings with it

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tranquillity like its shadow: so Timon and Aenesidemus declare.

For in matters which are for us to decide we shall neither choose this nor shrink from that; and things which are not for us to decide but happen of necessity, such as hunger, thirst and pain, we cannot escape,[*](Τὰ δʼ ὅσα περὶ ἡμᾶς οὐκ ἔστιν, ἀλλὰ κατʼ ἀνάγκην, οὐ δυνάμεθα φεύγειν. This is explained by Sext. Emp. Pyrrh. Hyp. i. 29 ὀχλεῖς θαίφαμεν (sc. τὸν σκεπτικὸν) ὑπὸ τῶν κατηναγκα σμένων· For we admit that we feel cold, that we are thirsty, etc.) for they are not to be removed by force of reason. And when the dogmatists argue that he may thus live in such a frame of mind that he would not shrink from killing and eating his own father if ordered to do so, the Sceptic replies that he will be able so to live as to suspend his judgement in cases where it is a question of arriving at the truth, but not in matters of life and the taking of precautions. Accordingly we may choose a thing or shrink from a thing by habit and may observe rules and customs. According to some authorities the end proposed by the Sceptics is insensibility; according to others, gentleness.[*](i.e. a calm, the opposite of an excitable, temperament: cf. Plato, Lys. 211 e πρᾁως ἔχω.)