VI. He then, perceiving that natural philosophy had no immediate bearing on our interests, began to enter upon moral speculations, both in his workshop and in the market-place. And he said that the objects of his search were— Whatever good or harm can man befall In his own house. And very often, while arguing and discussing points that arose, he was treated with great violence and beaten, and pulled about, and laughed at and ridiculed by the multitude. But he bore all this with great equanimity. So that once, when he had been kicked and buffeted about, and had borne it all patiently, and some one expressed his surprise, he said, “Suppose an ass had kicked me, would you have had me bring an action against him?” And this is the account of Demetrius. VII. But he had no need of travelling (though most philosophers did travel), except when he was bound to serve in the army. But all the rest of his life he remained in the same place, and in an argumentative spirit he used to dispute with all who would converse with him, not with the purpose of taking away their opinions from them, so much as of learning the truth, as far as he could do so, himself. And they say that Euripides gave him a small work of Heraclitus to read, and asked him afterwards what he thought of it, and he replied, “What I have understood is good; and so, I think, what I have not understood is; only the book requires a Delian diver to get at the meaning of it.” He paid great attention also to the training of the body, and was always in excellent condition himself. Accordingly, he joined in the expedition to Amphipolis, and he it was who took up and saved Xenophon in the battle of Delium, when he had fallen from his horse; for when all the Athenians had fled, he retreated quietly, turning round slowly, and watching to repel any one who attacked him. He also joined in the expedition to Potidæa, which was undertaken by sea; for it was impossible to get there by land, as the war impeded the communication. And they say that on this occasion he remained the whole night in one place; and that though he had deserved the prize of pre-eminent valour, he yielded it to Alcibiades, to whom Aristippus, in the fourth book of his treatise on the Luxury of the Ancients, says that he was greatly attached. But Ion, of Chios, says, that while he was a very young man he left Athens, and went to Samos with Archelaus. And Aristotle says, that he went to Delphi; and Phavorinus also, in the first book of his Commentaries, says that he went to the Isthmus.