Suppose again, I said, that the world says to me: "Why do you spend many words and speak in many ways on this subject?" Excuse me, friends, I should reply; but in the first place there is a difficulty in explaining the meaning of the expression "overcome by pleasure"; and the whole argument turns upon this. And even now, if you see any possible way in which evil can be explained as other than pain, or good as other than pleasure, you may still retract.
Are you satisfied, then, at having a life of pleasure which is without pain? If you are, and if you are unable to show any good or evil which does not end in pleasure and pain, hear the consequences:-If what you say is true, then the argument is absurd which affirms that a man often does evil knowingly, when he might abstain, because he is seduced and overpowered by pleasure; or again, when you say that a man knowingly refuses to do what is good because he is overcome at the moment by pleasure. And that this is ridiculous will be evident if only we give up the use of various names, such as pleasant and painful, and good and evil. As there are two things, let us call them by two names-first, good and evil, and then pleasant and painful.