What assumptions does the Chrous make about the relationship between human and the gods? How does Oedipus contradict them immediately afterwards?

The Chorus assumes that people are at the mercy of the Gods and that the Gods must be appeased. By killing his father and marrying his mother, Oedipus trying to go against the gods and fate. In Athenian culture, the incest which Oedipus has committed - as well as the murder of his father - would have been considered both crimes against the natural order and crimes against the gods.