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 ployed about articulate speech; is then the art also articulate speech? By no means. For this reason it is not able to contemplate itself. Now reason, for what purpose has it been given by nature? For the right use of appearances. What is it then itself? A system (combination) of certain appearances. So by its nature it has the faculty of contemplating itself also. Again, sound sense, for the contemplation of what things does it belong to us? Good and evil, and things which are neither. What is it then itself? Good. And want of sense, what is it? Evil. Do you see then that good sense necessarily contemplates both itself and the opposite? For this reason it is the chief and the first work of a philosopher to examine appearances, and to distinguish them, and to admit none without examination. You see even in the matter of coin, in which our interest appears to be somewhat concerned, how we have invented an art, and how many means the assayer uses to try the value of coin, the sight, the touch, the smell, and lastly the hearing. He throws the coin (denarius) down, and observes the sound, and he is not content with its sounding once, but through his great attention he becomes a musician. In like manner, where we think that to be mistaken and not to be mistaken make a great difference, there we apply great attention to discovering the things which can deceive. But in the matter of our miserable ruling faculty, yawning and sleeping, we carelessly admit every appearance, for the harm is not noticed.

When then you would know how careless you are with respect to good and evil, and how active with respect to things which are indifferent (neither good nor evil), observe how you feel with respect to being deprived of the sight of the eyes, and how with respect to being deceived, and you will discover that you are far from feeling as you ought to do in relation to good and evil. But this is a matter which requires much preparation, and much labour and study. Well then do you expect