I hold it then in every way proved that Cambyses was quite insane; or he would never have set himself to deride religion and custom. For if it were proposed to all nations to choose which seemed best of all customs, each, after examination, would place its own first; so well is each convinced that its own are by far the best. It is not therefore to be supposed that anyone, except a madman, would turn such things to ridicule. I will give this one proof among many from which it may be inferred that all men hold this belief about their customs. When Darius was king, he summoned the Greeks who were with him and asked them for what price they would eat their fathers' dead bodies. They answered that there was no price for which they would do it. Then Darius summoned those Indians who are called Callatiae, who eat their parents, and asked them (the Greeks being present and understanding through interpreters what was said) what would make them willing to burn their fathers at death. The Indians cried aloud, that he should not speak of so horrid an act. So firmly rooted are these beliefs; and it is, I think, rightly said in Pindar's poem that custom is lord of all.