Does the Sceptic Study Natural Science?
We reply similarly also to the question whether the Sceptic should study natural science. For we do not study natural science in order to express ourselves with confidence regarding any of the dogmas that it teaches, but we take it up in order to be able to meet every argument by one of equal weight, and also for the sake of ἀταραξία. In the same way we study the logical and ethical part of so-called philosophy.
CHAPTER X.
Do the Sceptics deny Phenomena?
Those who say that the Sceptics deny phenomena appear to me to be in ignorance of our teachings. For as we said before, we do not deny the sensations which we think we have, and which lead us to assent involuntarily to them, and these are the phenomena. When, however, we ask whether the object is such as it appears to be, while we concede that it appears so and so, we question, not the phenomenon, but in regard to that which is asserted of the phenomenon, and that is different from doubting the phenomenon itself. For example, it appears to us that honey is sweet. This we concede, for we experience sweetness through sensation. We doubt, however, whether it is sweet by reason of its essence, which is not a question of the phenomenon, but of that which is asserted of the phenomenon. Should we, however, argue directly against the phenomena, it is not with the intention of denying their existence, but to show the rashness of the Dogmatics. For if reasoning is such a deceiver that it well nigh snatches away the phenomena from before your eyes, how should we not distrust it in regard to things that are unknown, so as not to rashly follow it?
CHAPTER XI.
The Criterion of Scepticism.
It is evident that we pay careful attention to phenomena from what we say about the criterion of the Sceptical School. The word criterion is used in two ways. First, it is understood as a proof of existence or non-existence, in regard to which we shall speak in the opposing argument. Secondly, when it refers to action, meaning the criterion to which we give heed in life, in doing some things and refraining from doing others, and it is about this that we shall now speak. We say, consequently, that the criterion of the Sceptical School is the phenomenon, and in calling it so, we mean the idea of it. It cannot be doubted, as it is based upon susceptibility and involuntary feeling. Hence no one doubts, perhaps, that an object appears so and so, but one questions if it is as it appears. Therefore, as we cannot be entirely inactive as regards the observances of daily life, we live by giving heed to phenomena, and in an unprejudiced way. But this observance of what pertains to the daily life, appears to be of four different kinds. Sometimes it is directed by the guidance of nature, sometimes by the necessity of the feelings, sometimes by the tradition of laws and of customs, and sometimes by the teaching of the arts. It is directed by the guidance of nature, for by nature we are capable of sensation and thought; by the necessity of the feelings, for hunger leads us to food, and thirst to drink; by the traditions of laws and customs, for according to them we consider piety a good in daily life, and impiety an evil; by the teaching of the arts, for we are not inactive in the arts we undertake. We say all these things, however, without expressing a decided opinion.