 At this point, we can see that Epicurus has so refined the account of pleasure and pain that he is able to tie them to virtue. In the Letter to Menoeceus, he claims, as a truth for which he does not argue, that virtue and pleasure are inseparable and that living a prudent, honorable, and just life is the necessary and sufficient means to the pleasure that is the end of life (132). An example of what he might mean is found in Principal Doctrines, where Epicurus holds that justice is a contract among humans to avoid suffering harm from one another. Then he argues that injustice is not bad per se but is bad because of the fear that arises from the expectation that one will be punished for his misdeeds. He reinforces this claim by arguing that it is impossible for someone who violates the compact to be confident that he will escape detection (Principal Doctrines XXXIV–V). While one might doubt this claim about the malfactor’s state of mind, nevertheless, we can see that Epicurus means to ground justice, understood as the rules governing human intercourse, in his moral psychology, i.e., the need to avoid distress.