Book Reports / Oedipus the king fate vs. free will help on thesis statement [18]

Oedipus the king uses symbolism to show fate unfolds truth;Advice on thesis statement

Hi
I needed help with with my thesis statement for oedipus the king in making sure that my literary element and theme go together.

Thesis: In Oedipus the king, Sophocles uses symbolism to show that fate unfolds truth.

Im confused on how to find words to put a good thesis together.
help please. Thanks!