about the supreme good, but only about the propriety of associating or not associating a friend in its participation: whether the wise man will do this not for his own sake, but for the sake of his friend in whose good he delights as in his own. So, too, when it is asked whether all things about which philosophy is concerned are to be considered uncertain, as by the New Academy, or certain, as the other philosophers maintain, the question here is not what end should be pursued, but whether or not we are to believe in the substantial existence of that end; or, to put it more plainly, whether he who pursues the supreme good must maintain that it is a true good, or only that it appears to him to be true, though possibly it may be delusive,--both pursuing one and the same good. The distinction, too, which is founded on the dress and manners of the Cynics, does not touch the question of the chief good, but only the question whether he who pursues that good which seems to himself true should live as do the Cynics. There were, in fact, men who, though they pursued different things as the supreme good, some choosing pleasure, others virtue, yet adopted that mode of life which gave the Cynics their name. Thus, whatever it is which distinguishes the Cynics from other philosophers, this has no bearing on the choice and pursuit of that good which constitutes happiness. For if it had any such bearing, then the same habits of life would necessitate the pursuit of the same chief good, and diverse habits would necessitate the pursuit of different ends. 2. _How Varro, by removing all the differences which do not form sects, but are merely secondary questions, reaches three definitions of the chief good, of which we must choose one._