What internal conflict prevents Tiresias from telling the truth at first?

Tiresias is initially reluctant to tell Oedipus the truth about his fate because he knows that revealing the prophecy will bring great suffering and destruction to Oedipus and his family. He struggles with the moral dilemma of deciding whether to tell the truth and fulfill his duty as a prophet, or withhold the information to prevent harm. Ultimately, Tiresias chooses to disclose the prophecy, leading to the tragic consequences that unfold in the story.