The Stoics remain, who after they had borrowed everything from the Peripatetics and Academics, pursued the same objects under different names. It is better to reply to them all separately. But let us stick to our present subject; we can deal with those men at a more convenient season. But the “security” of Democritus, which is as it were a sort of tranquillity of the mind which they all εὐθυμία, deserved to be separated from this discussion, because that tranquillity of the mind is of itself a happy life. What we are inquiring, however, is not what it is, but whence it is derived. The opinions of Pyrrho, Aristo, and Herillus, have long ago been exploded and discarded, as what can never be applicable to this circle of discussion to which we limit ourselves, and which had no need to have been ever mentioned; for as the whole of this inquiry is about the chief, and what I may call the highest good and evil, it ought to start from that point which we call suitable and adapted to nature, and which is sought of itself for itself. Now this is wholly put out of the question by those who deny that in those things in which there is nothing either honourable or dishonourable, there is any reason why one thing should be preferred to another, and who think that there is actually no difference whatever between those things. And Herillus, if he thought that nothing was good except knowledge, put an end to all reason for taking counsel, and to all inquiry about duty. Thus, after we have got rid of the opinions of the rest, as there can be no other, this doctrine of the ancients must inevitably prevail. IX. Therefore, after the fashion of the ancients, which the Stoics also adopt, let us make this beginning:—Every animal loves itself, and as soon as it is born labours to preserve itself, because this is the first desire given to it by nature, to regulate its whole life, to preserve itself, and to be so disposed as it best may in accordance with nature. At the beginning it has such a confused and uncertain kind of organization that it can only just take care of itself, whatever it is; but it does not understand either what it is, or what its powers are, or what its nature is. But when it has advanced a little, and begins to perceive how far anything touches it, or has reference to it, then it begins gradually to improve, and to comprehend itself, and to understand for what cause it has that appetite of the mind which I have spoken of; and begins also to desire those things which it feels to be suited to its nature, and to keep off the contrary. Therefore, in the case of every animal, what it wishes is placed in that thing which is adapted to its nature. And so the chief good is to live according to nature, with the best disposition and the most suitable to nature that can be engendered.