SOCRATES: Men who do any of these things do them for the sake of the good?
POLUS: Yes.
SOCRATES: And did we not admit that in doing something for the sake of something else, we do not will those things which we do, but that other thing for the sake of which we do them?
POLUS: Most true.
SOCRATES: Then we do not will simply to kill a man or to exile him or to despoil him of his goods, but we will to do that which conduces to our good, and if the act is not conducive to our good we do not will it; for we will, as you say, that which is our good, but that which is neither good nor evil, or simply evil, we do not will. Why are you silent, Polus? Am I not right?
POLUS: You are right.
SOCRATES: Hence we may infer, that if any one, whether he be a tyrant or a rhetorician, kills another or exiles another or deprives him of his property, under the idea that the act is for his own interests when really not for his own interests, he may be said to do what seems best to him?
POLUS: Yes.
SOCRATES: But does he do what he wills if he does what is evil? Why do you not answer?
POLUS: Well, I suppose not.