Oedipus the King.

Sophocles "Oedipus the King" is a tragic play, which discusses the tragic discovery of Oedipus that he has killed his father, and married his mother. The story of Oedipus was well known to the Athenian's. Oedipus is the embodiment of the perfect Athenian. He is self-confident, intelligent, and strong willed. Ironically these are the very traits which bring about his tragic discovery. Oedipus gained the rule of Thebes by answering the riddle of Sphinx. Sophocles …

…Oedipus would kill his father and marry his mother by the oracle, he only stated what he knew was inevitable because of who Oedipus was. The sphinx's riddle was used by Sophocles to characterize Oedipus as a tragic man and as a parallel to his life. The riddle describes the 3 stages, which Oedipus went through in his life. Also in answering the riddle Oedipus inevitable brought about his own tragic ending by a horrible discovery.