Big Question with respect to Oedipus Rex

In Oedipus Rex, Oedipus initially does not believe the truth that Teiresias presents him because it is more convenient to refuse to believe that he was indeed Laios' killer. As the story unfolds, however, he is forced to face his actions and their ensuing consequences. Therefore, in this case, Oedipus' nature leads him to follow the most convenient "truth."

AP Literature Big Question

My question to track through out literature selections this year is: With relation to truth, does human nature lead people to do what is most physically convenient or morally righteous?