Oedipus Rex reveals the prophecy which caused him to leave Corinth (791-93): "that I was fated to lie with my mother," "and show to daylight an accursed breed" "which men would not endure, and I was doomed" "to be murderer of the father that begot me." The implication of Laius's oracle is ambiguous. One interpretation considers that the presentation of Laius's oracle in this play differs from that found in Aeschylus's Oedipus trilogy produced in 467 BC. Helaine Smith argues: Sophocles had the option of making the oracle to Laius conditional ("if" Laius has a son, that son will kill him) or
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