Therefore you are all of you seeking for this, and so are those who say that they pursue whatever comes into their mind and occurs to them; and you return to nature. But nature will fairly reply to you, that it is not true that the chief happiness of life is to be sought in another quarter, but the principles of action in herself: for that there is one system only, in which both the principles of action and the chief good too is contained; and that, as the opinion of Aristo is exploded, when he says that one thing does not differ from another, and that there is nothing except virtue and vice in which there was any difference whatever; so, too, Zeno was in the wrong, who affirmed that there was no influence in anything, except virtue or vice, of the very least power to assist in the attainment of the chief good: and as that had no influence on making life happy, but only in creating a desire for things, he said that there was some power of attraction in them: just as if this desire had no reference to the acquisition of the chief good. But what can be less consistent than what they say, namely, that when they have obtained the knowledge of the chief good they then return to nature, in order to seek in it the principle of action, that is to say, of duty? For it is not the principle of action or duty which impels them to desire those things which are according to nature; but desire and action are both set in motion by those things. XVIII. Now I come to those brief statements of yours which you call conclusions; and first of all to that—than which, certainly, nothing can be more brief—that "everything good is praiseworthy; but everything praiseworthy is honourable; therefore everything good is honourable." Oh, what a leaden dagger!—for who will grant you your first premises? And if it should be granted to you, then you have no need of the second: for if everything good is praiseworthy, so is everything honourable; who, then, will grant you this, except Pyrrho, Aristo, and men like them?—whom you do not approve of. Aristotle, Xenocrates, and all that school, will not grant it; inasmuch as they call health, strength, riches, glory, and many other things good, but not praiseworthy; and they therefore do not think that the chief good is contained in virtue alone, though still they do prefer virtue to everything else. What do you think that those men will do who have utterly separated virtue from the chief good, Epicurus, Hieronymus, and those too, if indeed there are any such, who wish to defend the definition of the chief good given by Carneades? And how will Callipho and Diodorus be able to grant you what you ask, men who join to honourableness something else which is not of the same genus?—Do you, then, think it proper, Cato, after you have assumed premises which no one will grant to you, to derive whatever conclusion you please from them? Take this sorites, than which you think nothing can be more faulty: “That which is