The exchange between Creon and Tiresias is compelling enough for Creon to change over the course of the drama. Tiresias enters the court and tells Creon of all that has happened in response to him not honoring the dead son of Oedipus. Tiresias enters to help the king, as he has done in the past. Yet, Creon's arrogance gets the best of him and he hurls insults to the blind seer, prompting lines like this to be uttered before he leaves:
And you—know well that before the sun has
run a few laps more, you will give one from
your loins, a corpse for corpses, in exchange
for those you have sent from above the earth(1075)
to below it, the living soul you have lodged
dishonorably in a tomb, and the
unhappy, unburied, unholy corpse
you hold back from the gods below.
The idea of Creon having to "exchange" a "corpse for corpses" is fairly telling. The fact that Creon's refusal to honor one dead will result in multiple is something that dislodges him. The stunning rebuke of "you will give one from your loins" points to Haemon, and helps to cause a change in Creon. Yet, Tiresias continues:
....this violence comes from you. For these things,
however, the destroying avengers
of Hell and the Furies of the gods are
lying wait for you, that you may be taken
in these same evils. Consider also(1085)
if I say these things as a hired accuser,
for a short time will reveal the wailing
of men and women in your house.
It is interesting to note that while Creon has acted in the name of the public, as the king, Tiresias predicts doom on the personal level. It is not as king where he strikes, but rather in the idea of the "wailing of men and women in your house" and that the powers of the divine have aligned against him, Creon, as a person and not as a king. Sophocles' inclusions on this point help to bring out that while the Greek rulers were seen as kings and political heads of city- states, they broke and feared as human beings would. Tiresias' prophecies on this level is what haunts Creon and terrifies him.
Upon such doomsday predictions, the Chorus, assuming a fairly active role throughout the drama, but really so here, is alarmed at what Tiresias has said. Creon's response demonstrates the first moment of his change and why it has happened:
I know, and I, too, am shaking in my heart,(1105)
This is the moment when the reader understands that Creon has changed. The prophecies of doom on a personal level have caused a shift in Creon's perception of himself and his actions. He no longer is willing to identify his own belief system as absolute. Whether he changes out of a sense of the sincere and genuine, or if he has changed out of fear in the predictions of Tiresias, Creon has changed in that he is "shaking in" his "heart." Here is where transformation has happened in him, but several moments too late.