Oedipus Rex unconditional (Laius "will" have a son who will kill him). Both Aeschylus and Euripides write plays in which the oracle is conditional; Sophocles ... chooses to make Laius's oracle unconditional and thus removes culpability for his sins from Oedipus, for he could not have done other than what he did, no matter what action he took. This interpretation is supported by Jocasta's repetition of the oracle at lines 854–55: "Loxias declared that the king should be killed by/ his own son." In the Greek, Jocasta uses the verb "chrênai": "to be fated, necessary." This iteration of the oracle seems to
Oedipus at Colonus a city in which proper boundaries and identities are not maintained, allowing the playwright to explore themes like incest, murder, and hubris in a safe setting. While the two other plays about Oedipus often bring up the theme of a person's moral responsibility for their destiny, and whether it is possible to rebel against destiny, "Oedipus at Colonus" shows Oedipus's resolution of the problem. In "Oedipus Rex," he was told by Tiresias, "You bear your fate and I will bear mine," a message repeated by the Chorus, but scorned by Oedipus, who like his father has believed he can escape