because he availed himself of the dialectic of Diodorus, but was 235 wholly a Platonist.  Now Philo and his followers say that as far as the Stoic criterion is concerned, that is to say the [Greek:  phantasia kataleptike], things are incomprehensible, but as far as the nature of things is concerned, they are comprehensible.  Antiochus, however, transferred the Stoa to the Academy, so that it was even said of him that he taught the Stoic philosophy in the Academy, because he tried to show that the Stoic doctrines are found in Plato.  The difference, therefore, between the Sceptical School and the Fourth and Fifth Academy is evident.

CHAPTER XXXIV.

Is Empiricism in Medicine the same as Scepticism?

Some say that the medical sect called Empiricism is the same 236 as Scepticism.  Yet the fact must be recognised, that even if Empiricism does maintain the impossibility of knowledge, it is neither Scepticism itself, nor would it suit the Sceptic to take that sect upon himself.  He could rather, it seems to me, belong to the so-called Methodic School.  For this alone, of all the medical sects, does not seem to proceed rashly in regard to 237 unknown things, and does not presume to say whether they are comprehensible or not, but is guided by phenomena, and receives from them the same help which they seem to give to the Sceptical system.  For we have said in what has gone before, that the every-day life which the Sceptic lives is of four parts, depending on the guidance of nature, on the necessity of the feelings, on the traditions of laws and customs, and on the teaching of the arts.  Now as by necessity of the feelings 238 the Sceptic is led by thirst to drink, and by hunger to food, and to supply similar needs in the same way, so also the physician of the Methodic School is led by the feelings to find suitable remedies; in constipation he produces a relaxation, as one takes refuge in the sun from the shrinking on account of intense cold; he is led by a flux to the stopping of it, as those in a hot bath who are dripping from a profuse perspiration and are relaxed, hasten to check it by going into the cold air.  Moreover, it is evident that the Methodic physician forces those things which are of a foreign nature to adapt themselves to their own nature, as even the dog tries to get a sharp stick out that is thrust into him.  In order, however, that I should 239 not overstep the outline character of this work by discussing details, I think that all the things that the Methodics have thus said can be classified as referring to the necessity of the feelings that are natural or those that are unnatural.  Besides this, it is common to both schools to have no dogmas, and to use words loosely.  For as the Sceptic uses the formula “I 240 determine nothing,” and “I understand nothing,” as we said above, so the Methodic also uses the expressions