"While the whole city teems with incense - smoke, and paean hymns, and sounds of woe the while?" Oedipus is asking the priest what is thy problem.
Scene 2 (pg. 25)
You betrayed me!
This guy is unbelievable!
"So shall you see me, as of right, with you, venging this country and the God together." Oedipus is vowing to rid the plague, and find Lauis killer.
Scene 2 (pg. 29)
Am I Laius' killer?
"I say that you are Laius' murderer - He whom you seek." Tiresias revealed that Oedipus is the murderer of Laius, but due to Oedipus' hubris, he doesn't believe him.
Fate Vs. Free Will
I have no free will!
"You are a traitor!" Oedipus and Creon are having a quarrel about the murder of Laius. Oedipus believes Creon is in league with Tiresias, and is trying to overthrow him.
"He was tall; The first white flowers had blossomed in his hair; His figure was not much unlike your own." Jocasta reveals that Oedipus looks like Laius, shocking Oedipus, and making him realize he might be the murderer.
The theme is that you may believe you have control of your actions, but you're always under the fate decreed by the gods.