Chrysippus confesses that good things are totally different from bad; and it must of necessity be so, if these make them with whom they are present miserable to the very utmost point, and those render their possessors in the highest degree happy. Now he says, that good and evil things are sensible, writing thus in his First Book of the End: That good and evil things are perceptible by sense, we are by these reasons forced to say; for not only the passions, with their species, as sorrow, fear, and such others, are sensible; but we may also have a sense of theft, adultery, and the like, and generally, of folly, cowardice, and other vices not a few; and again, not only of joy, beneficence, and many other dependences on good deeds, but also of prudence, fortitude, and the other virtues. Let us pass by the other absurdities of these things; but that they are repugnant to those things which are delivered by him concerning the wise man that knows nothing of his being so, who does not confess? For good, when present, being sensible and having a great difference from evil, is it not most absurd, that he who is of bad become good should be ignorant of it, and not perceive virtue when present, but think that vice is still within him? For either none who has all virtues can be ignorant and doubt of his having them; or the difference of virtue from vice, of happiness from misery, and of a most honest life from a most shameful one, is little and altogether difficult to be discerned, if he who has exchanged the one for the other does not perceive it.