How does Oedipus at the beginning of the play contrast with Oedipus at the end of the play?

At the beginning of "Oedipus Rex," Oedipus is portrayed as a confident and capable leader, determined to save Thebes from the plague and unaware of his tragic fate. He is assertive and takes pride in solving the riddle of the Sphinx, showcasing his intelligence and strength. By the end of the play, however, Oedipus is devastated and humbled, having discovered the horrifying truth about his lineage and the fulfillment of the prophecy. His transition from a proud king to a broken man highlights the themes of fate, knowledge, and the limits of human understanding.