Your ankles had been pierced and tied together.I set them free.
My dreadful mark of shame—I’ve had that scar there since I was a child.
Catharsis
Jocasta
Hamartia
You were the one to kill Laius...
You are telling lies!
This is when the messenger tells Oedipus that he had found him with his ankles pierced. This is when Oedipus realizes that the he forsake himself because he was the one to kill Laius.
Hubris
I refuse to follow this prophecy.
After her fight with Oedipus, she states that she wont speak again. This leads to the audience assuming that she will kill herself. Later we see the she did kill herself, this leads to the audience feeling bad for the fact that she killed herself.
Dramatic Irony
"I shall speak as one who is a stranger to the story"
When Teiresias tells Oedipus that he is the one who killed Laius. Oedipus refused to believe it, his pride led him to call Teiresias a lier. When in reality it was the truth the whole time.
Symbolism
Oedipus refuses to kill his father and marry his mother. However when he leaves his saposide parents, he is actually killing Laius (his real father) and marring Jocasta (his real mom) Thus he is fulfilling the prophecy when he believes it will never happen.
When Creon arrives and tells Oedipus and the people what they must do to free thebes of the pestilence. Oedipus makes a statement saying he is a stranger to what happened to Laius. However we as the audience know that it was Oedipus who killed laius, that is the dramatic Irony
When Oedipus stabs his eyes it shows symbolism. It shows the idea that he was blind to the truth even when it was put directly in front of him.