These then are the doctrines on the subject of natural philosophy entertained by them, which it seems sufficient for us to detail, having regard to the due proportions of this book. And the following are the points in which some of them disagreed with the rest. LIFE OF ARISTON. I. Ariston the Bald, a native of Chios, surnamed the Siren, said, that the chief good was to live in perfect indifference to all those things which are of an intermediate character between virtue and vice; making not the slightest difference between them, but regarding them all on a footing of equality. For that the wise man resembles a good actor; who, whether he is filling the part of Agamemnon or Thersites, will perform them both equally well. II. And he discarded altogether the topic of physics, and of logic, saying that the one was above us, and that the other had nothing to do with us; and that the only branch of philosophy with which we had any real concern was ethics. III. He also said that dialectic reasonings were like cobwebs; which, although they seem to be put together on principles of art, are utterly useless. IV. And he did not introduce many virtues into his scheme, as Zeno did; nor one virtue under a great many names, as the Megaric philosophers did; but defined virtue as consisting in behaving in a certain manner with reference to a certain thing. V. And as he philosophized in this manner, and carried on his discussions in the Cynosarges, he got so much influence as to be called a founder of a sect. Accordingly, Miltiades, and Diphilus were called Aristoneans. VI. He was a man of very persuasive eloquence, and one who could adapt himself well to the humours of a multitude. On which account Timon says of him:— And one who, from Ariston’s wily race, Traced his descent. Diocles, the Magnesian, tells us that Ariston having fallen in with Polemo, passed over to his school, at a time when Zeno was lying ill with a long sickness. The Stoic doctrine to which he was most attached, was the one that the wise man is never guided by opinions. But Persæus argued against this, and caused one of two twin brothers to place a deposit in his hands, and then caused the other to reclaim it; and thus he convicted him, as he was in doubt on this point, and therefore forced to act on opinion. He was a great enemy of Arcesilaus. And once, seeing a bull of a monstrous conformation, having a womb, he said, “Alas! here is an argument for Arcesilaus against the evidence of his senses.” On another occasion, when a philosopher of the Academy said that he did not comprehend anything, he said to him, “Do not you even see the man who is sitting next to you?” And as he said that he did not, he said:— Who then has blinded you, who’s been so harsh, As thus to rob you of your beaming eyes?