Oedipus Essay?

I have to write an essay to prove that Oedipus Rex (from Oedipus the King) is a tragic hero according to Aristotle's qualicfications. I know he is a tragic hero but i need to include two quotes from the story for each qualification. I pretty much have the quotes for each qualification but i need a creative way to start the essay. She suggests we use a quote from the story or something that Aristotle said or any famous quote or something that just grabs people's attention. Also i need a good thesis statement but i'm not really sure what one could be. So please anyone who has any suggestions for an "attention grabber" for the introduction of the essay please respond and any ideas for a good thesis. Thank you so much!