Book Reports / Oedipus Rex & Antigone- essay *need help with thesis* [7]

Oedipus Thesis / topic suggestions

so i need to make up a thesis about oudipus the king. ive read it and its really good. so what my teacher wants is a thesis that tries to prove something thats not obvious. so something like " Oedipus is arrogant because he is ..." but instead she wants a one line thesis that's connects to one of the themes in the play. Any help would be appreciated. i wish i could think of one but every single one i show her, she thinks is a level 2. i need a level 4